diff --git a/PrINTech-Back/back/apps/api/migrations/0001_initial.py b/PrINTech-Back/back/apps/api/migrations/0001_initial.py
index 7145403..876b00d 100644
--- a/PrINTech-Back/back/apps/api/migrations/0001_initial.py
+++ b/PrINTech-Back/back/apps/api/migrations/0001_initial.py
@@ -1,9 +1,10 @@
-# Generated by Django 6.0.2 on 2026-02-17 23:53
+# Generated by Django 6.0.2 on 2026-02-23 19:59
 
 import django.contrib.auth.models
 import django.contrib.auth.validators
 import django.db.models.deletion
 import django.utils.timezone
+import uuid
 from django.conf import settings
 from django.db import migrations, models
 
@@ -31,13 +32,12 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('type', models.CharField(choices=[('SLA/DLP/MSLA', 'Sla'), ('SLS/MJF', 'Sls'), ('FDM/FFF', 'Fdm'), ('MJP', 'Mjp'), ('Binder_Jetting', 'Binder Jetting'), ('DMLS/SLM', 'Dmls')], max_length=25)),
-                ('status', models.CharField(choices=[('UP', 'Up'), ('DOWN', 'Down'), ('USED', 'Used')], max_length=25)),
+                ('status', models.CharField(choices=[('UP', 'Up'), ('DOWN', 'Down'), ('USED', 'Used')], default='DOWN', max_length=25)),
             ],
         ),
         migrations.CreateModel(
             name='User',
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('password', models.CharField(max_length=128, verbose_name='password')),
                 ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
                 ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
@@ -47,8 +47,10 @@ class Migration(migrations.Migration):
                 ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
                 ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
                 ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
                 ('email', models.EmailField(max_length=254, unique=True)),
-                ('credit', models.DecimalField(decimal_places=2, default=0, max_digits=6)),
+                ('credit', models.IntegerField(default=0)),
+                ('is_bot', models.BooleanField(default=False)),
                 ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.group', verbose_name='groups')),
                 ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.permission', verbose_name='user permissions')),
             ],
@@ -64,9 +66,9 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='File',
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
                 ('path', models.FileField(upload_to='uploads/%Y/%m/%d')),
-                ('number_of_printing', models.IntegerField(default=1)),
+                ('number_of_printing', models.PositiveIntegerField(default=1)),
                 ('para_slicer', models.JSONField(blank=True, null=True)),
                 ('filament_id', models.ManyToManyField(to='api.filament')),
                 ('user_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
@@ -75,21 +77,21 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='Operation',
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('datetime', models.DateTimeField(auto_now_add=True)),
-                ('operation_type', models.CharField(choices=[('WITHDRAW', 'Withdraw'), ('ADDING', 'Adding')], max_length=25)),
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('operation_type', models.CharField(choices=[('CASH', 'Cash'), ('CARD', 'Card')], max_length=25)),
                 ('comment', models.TextField(blank=True, null=True)),
-                ('amount', models.PositiveIntegerField(default=0)),
-                ('signer_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='operation_signer', to=settings.AUTH_USER_MODEL)),
-                ('user_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='operation_receiver', to=settings.AUTH_USER_MODEL)),
+                ('amount', models.IntegerField(default=0)),
+                ('agent_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='operation_agent', to=settings.AUTH_USER_MODEL)),
+                ('beneficiary_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='operation_beneficiary', to=settings.AUTH_USER_MODEL)),
             ],
         ),
         migrations.CreateModel(
             name='Request',
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('datetime', models.DateTimeField(auto_now_add=True)),
-                ('status', models.CharField(choices=[('PENDING', 'Pending'), ('PROCESSING', 'Processing'), ('COMPLETED', 'Completed'), ('FAILED', 'Failed')], max_length=25)),
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('status', models.CharField(choices=[('PENDING', 'Pending'), ('PROCESSING', 'Processing'), ('COMPLETED', 'Completed'), ('FAILED', 'Failed')], default='PENDING', max_length=25)),
                 ('file_id', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.file')),
                 ('printer_id', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='api.printer')),
             ],
diff --git a/PrINTech-Back/back/apps/api/models.py b/PrINTech-Back/back/apps/api/models.py
index 944db9e..679ac12 100644
--- a/PrINTech-Back/back/apps/api/models.py
+++ b/PrINTech-Back/back/apps/api/models.py
@@ -8,6 +8,7 @@ class User(AbstractUser):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     email = models.EmailField(blank=False, unique=True, null=False)
     credit = models.IntegerField(default=0)
+    is_bot = models.BooleanField(default=False)
 
 
 class Filament(models.Model):
@@ -80,6 +81,7 @@ class Status(models.TextChoices):
     status = models.CharField(choices=Status.choices, max_length=25, null=False, blank=False, default=Status.PENDING)
 
 
+
 class Operation(models.Model):
 
     class Type(models.TextChoices):
diff --git a/PrINTech-Back/back/apps/api/serializers.py b/PrINTech-Back/back/apps/api/serializers.py
index 51786a6..88e7fc3 100644
--- a/PrINTech-Back/back/apps/api/serializers.py
+++ b/PrINTech-Back/back/apps/api/serializers.py
@@ -1,9 +1,12 @@
 from django.contrib.auth.password_validation import validate_password
 from rest_framework import serializers
-from .models import User
+from rest_framework.fields import UUIDField
+
+from .models import User, Request, File, Filament
 
 
 class ChangePasswordSerializer(serializers.Serializer):
+
     old_password = serializers.CharField(required=True, write_only=True)
     new_password = serializers.CharField(required=True, write_only=True)
     confirm_password = serializers.CharField(required=True, write_only=True)
@@ -49,3 +52,50 @@ class Meta:
         fields = ["id", "username", "password", "email"]
         extra_kwargs = {"password": {"write_only": True}}
 
+
+
+class CreateFileSerializer(serializers.ModelSerializer):
+    filaments = serializers.PrimaryKeyRelatedField(many=True, queryset=Filament.objects.all())
+
+    class Meta:
+        model = File
+        fields = [
+            "user_id",
+            "path",
+            "number_of_printing",
+            "filaments",
+            "para_slicer",
+        ]
+        extra_kwargs = {"user_id": {"read_only": True}}
+
+    def validate(self, data):
+        user = self.context["request"].user
+        path = data["path"]
+
+        if File.objects.filter(path=path, user_id=user).exists():
+            raise serializers.ValidationError("File already exists")
+
+        return data
+
+
+
+
+class CreateRequestSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Request
+        fields = ["file_id", "created_at"]
+        extra_kwargs = {"created_at": {"read_only": True}}
+
+    def validate(self, data):
+        user = self.context["request"].user
+        file = data["file_id"]
+        if file.user_id != user.id:
+            raise serializers.ValidationError("File doesn't belong to this user")
+        return data
+
+class ChangeRequestSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Request
+        fields = ["printer_id", "status"]
+        extra_kwargs = {"status": {"read_only": True}}
diff --git a/PrINTech-Back/back/apps/api/views.py b/PrINTech-Back/back/apps/api/views.py
index d7fa2fc..951fd5d 100644
--- a/PrINTech-Back/back/apps/api/views.py
+++ b/PrINTech-Back/back/apps/api/views.py
@@ -1,11 +1,17 @@
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
+from rest_framework.authentication import TokenAuthentication
+from rest_framework.decorators import action
 from rest_framework.response import Response
 from rest_framework_simplejwt.tokens import RefreshToken, AccessToken
-from .models import User
-from rest_framework import permissions, viewsets, generics, status
-from django.shortcuts import render
-from rest_framework.permissions import AllowAny, IsAuthenticated
+from rest_framework_simplejwt.authentication import JWTAuthentication
+from .models import User, Request, File, Printer
+from rest_framework import viewsets, generics, status
+from rest_framework.permissions import AllowAny, IsAuthenticated, IsAdminUser
 from rest_framework.throttling import UserRateThrottle
-from .serializers import UserSerializer, ChangePasswordSerializer
+from .serializers import UserSerializer, ChangePasswordSerializer, CreateRequestSerializer, ChangeRequestSerializer, \
+    CreateFileSerializer
+from django.db import transaction
 
 class CreateUserView(generics.CreateAPIView):
     queryset = User.objects.all()
@@ -15,7 +21,8 @@ class CreateUserView(generics.CreateAPIView):
 
     def create(self, request, *args, **kwargs):
         if request.user.is_authenticated:
-            return Response({"Message": "Vous ne devez pas être authentifié."},status=status.HTTP_403_FORBIDDEN)
+            return Response({"Message": "You need to be disconnected"},status=status.HTTP_403_FORBIDDEN)
+
         serializer = self.get_serializer(
             data=request.data, context={"request": request}
         )
@@ -53,6 +60,113 @@ def get_object(self):
     def update(self, request, *args, **kwargs):
         super().update(request, *args, **kwargs)
         return Response(
-            {"message": "Mot de passe changé avec succès."}, status=status.HTTP_200_OK
+            {"message": "Your password has been successfully modified."}, status=status.HTTP_200_OK
         )
 
+
+class RequestViewSet(viewsets.ModelViewSet):
+    queryset = Request.objects.all()
+    authentication_classes = [TokenAuthentication, JWTAuthentication]
+    throttle_classes = [UserRateThrottle]
+
+    def get_permissions(self):
+        if self.action == 'destroy':
+            return [IsAdminUser()]
+        return [IsAuthenticated()]
+
+    def get_queryset(self):
+        user = self.request.user
+        if user.is_staff:
+            return Request.objects.all()
+        return Request.objects.filter(file_id__user_id=user)
+
+    def get_serializer_class(self):
+        if self.action in ['update', 'partial_update', 'completed']:
+            return ChangeRequestSerializer
+        return CreateRequestSerializer
+
+
+    def _assign_next_pending_request(self, printer):
+        with transaction.atomic():
+            next_request = Request.objects.filter(
+                status=Request.Status.PENDING
+            ).order_by('created_at').select_for_update(skip_locked=True).first()
+
+            if next_request:
+                next_request.printer_id = printer
+                next_request.status = Request.Status.PROCESSING
+                next_request.save()
+
+                printer.status = Printer.Status.USED
+                printer.save()
+                return True
+        return False
+
+
+    def perform_create(self, serializer):
+        new_request = serializer.save()
+        with transaction.atomic():
+            free_printer = Printer.objects.filter(status=Printer.Status.UP).first()
+            if free_printer:
+                self._assign_next_pending_request(free_printer)
+
+
+
+    @action(detail=True, methods=['post'], permission_classes=[IsAdminUser])
+    def completed(self, request, pk=None):
+        current_request = self.get_object()
+        printer = current_request.printer_id
+
+        if not request.user.is_bot :
+            return Response({"error": "you are not a bot"}, status=status.HTTP_400_BAD_REQUEST)
+
+        with transaction.atomic():
+            current_request.status = Request.Status.COMPLETED
+            current_request.save()
+
+            if printer:
+                printer.status = Printer.Status.UP
+                printer.save()
+
+        if printer:
+            assigned = self._assign_next_pending_request(printer)
+            if assigned:
+                return Response({'status': 'completed and new request assigned'})
+
+        return Response({'status': 'completed, printer is now idle'})
+
+class CreateFileView(generics.CreateAPIView):
+    permission_classes = [IsAuthenticated]
+    serializer_class = CreateFileSerializer
+    throttle_classes = [UserRateThrottle]
+
+    def perform_create(self, serializer):
+        serializer.save(user=self.request.user)
+
+
+class FileViewSet(viewsets.ModelViewSet):
+    serializer_class = CreateFileSerializer
+    permission_classes = [IsAuthenticated]
+    throttle_classes = [UserRateThrottle]
+
+    def get_queryset(self):
+        return File.objects.filter(user_id=self.request.user)
+
+    @receiver(post_delete, sender=File)
+    def submission_delete(sender, instance, **kwargs):
+        instance.path.delete(False)
+
+    def destroy(self, request, *args, **kwargs):
+        instance = self.get_object()
+        has_active_print = instance.requests.filter(
+            status__in=[Request.Status.PROCESSING, Request.Status.PENDING]
+        ).exists()
+
+        if has_active_print:
+            return Response(
+                {"error": "Impossible to delete this file, a request is being processed"},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+
+        return super().destroy(request, *args, **kwargs)
+
diff --git a/PrINTech-Back/back/settings/base.py b/PrINTech-Back/back/settings/base.py
index f58712a..66d88bd 100644
--- a/PrINTech-Back/back/settings/base.py
+++ b/PrINTech-Back/back/settings/base.py
@@ -108,6 +108,7 @@
     'rest_framework',
     'drf_spectacular',
     'rest_framework_simplejwt',
+    'rest_framework.authtoken',
 ]
 
 LOCAL_APPS = [
@@ -124,6 +125,11 @@
     'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
     'DEFAULT_AUTHENTICATION_CLASSES': (
         'rest_framework_simplejwt.authentication.JWTAuthentication',
+        'rest_framework.authentication.TokenAuthentication',
+        'rest_framework.authentication.SessionAuthentication',
+    ),
+    'DEFAULT_PERMISSION_CLASSES': (
+        'rest_framework.permissions.IsAuthenticated',
     )
 }
 
diff --git a/PrINTech-Back/back/urls.py b/PrINTech-Back/back/urls.py
index 62e7194..00ad222 100644
--- a/PrINTech-Back/back/urls.py
+++ b/PrINTech-Back/back/urls.py
@@ -4,21 +4,23 @@
 from rest_framework import routers, permissions
 from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView, SpectacularRedocView
 from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
-from .apps.api.views import CreateUserView, UserMeView, ChangePasswordView
+from .apps.api.views import CreateUserView, UserMeView, ChangePasswordView, \
+    RequestViewSet, CreateFileView, FileViewSet
 from .views import home
 
 admin.autodiscover()
 
 router = routers.DefaultRouter()
+router.register(r'requests', RequestViewSet, basename='request')
+router.register(r'files', FileViewSet, basename='file')
 
 urlpatterns = [
-    # Examples:
     path('', home, name='home'),
     path('api/schema/', SpectacularAPIView.as_view(), name='schema'),
-    # path('app/', include('apps.app.urls')),
-    path("api/v1/", include(router.urls)),
+
     path("api/v1/token/", TokenObtainPairView.as_view(), name="token_obtain_pair"),
     path("api/v1/token/refresh/", TokenRefreshView.as_view(), name="token_refresh"),
+
     path("api/v1/user/", CreateUserView.as_view(), name="create_user"),
     path("api/v1/user/me/", UserMeView.as_view(), name="user_info"),
     path(
@@ -26,9 +28,13 @@
         ChangePasswordView.as_view(),
         name="change-password",
     ),
+
+    path("api/v1/file/", CreateFileView.as_view(), name="create_file"),
+
     path('api/docs/', SpectacularSwaggerView.as_view(url_name='schema'), name='swagger-ui'),
     path('api/redoc/', SpectacularRedocView.as_view(url_name='schema'), name='redoc'),
     path('admin/', admin.site.urls),
+    path("api/v1/", include(router.urls)),
 ]
 
 # debug toolbar for dev
diff --git a/diagrams/auth-diagram.svg b/diagrams/auth-diagram.svg
new file mode 100644
index 0000000..e1e6bc9
--- /dev/null
+++ b/diagrams/auth-diagram.svg
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="1171px" preserveAspectRatio="none" style="width:934px;height:1171px;" version="1.1" viewBox="0 0 934 1171" width="934px" zoomAndPan="magnify"><defs/><g><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="184" x="367.75" y="26.708">"Sequencial Diagram</text><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="147" x="392.25" y="47.6611">Authentification"</text><rect fill="#FFFFFF" height="235.8672" style="stroke: #000000; stroke-width: 2.0;" width="899.5" x="13" y="285.7344"/><rect fill="#FFFFFF" height="131.3359" style="stroke: none; stroke-width: 1.0;" width="899.5" x="13" y="390.2656"/><rect fill="#FFFFFF" height="212.7344" style="stroke: #000000; stroke-width: 2.0;" width="899.5" x="13" y="666.1328"/><rect fill="#FFFFFF" height="108.2031" style="stroke: none; stroke-width: 1.0;" width="899.5" x="13" y="770.6641"/><rect fill="#FFFFFF" height="148.4688" style="stroke: #000000; stroke-width: 2.0;" width="751.5" x="13" y="994.2656"/><rect fill="#FFFFFF" height="43.9375" style="stroke: none; stroke-width: 1.0;" width="751.5" x="13" y="1098.7969"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 5.0,5.0;" x1="42" x2="42" y1="138.2031" y2="1159.7344"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 5.0,5.0;" x1="350.5" x2="350.5" y1="138.2031" y2="1159.7344"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 5.0,5.0;" x1="655.5" x2="655.5" y1="138.2031" y2="1159.7344"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 5.0,5.0;" x1="858.5" x2="858.5" y1="138.2031" y2="1159.7344"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="32" x="23" y="134.9014">User</text><ellipse cx="42" cy="68.9063" fill="#FEFECE" rx="8" ry="8" style="stroke: #A80036; stroke-width: 2.0;"/><path d="M42,76.9063 L42,103.9063 M29,84.9063 L55,84.9063 M42,103.9063 L29,118.9063 M42,103.9063 L55,118.9063 " fill="none" style="stroke: #A80036; stroke-width: 2.0;"/><rect fill="#FEFECE" height="30.2969" style="stroke: #A80036; stroke-width: 1.5;" width="139" x="281.5" y="106.9063"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="125" x="288.5" y="126.9014">Angular/Front-end</text><rect fill="#FEFECE" height="30.2969" style="stroke: #A80036; stroke-width: 1.5;" width="197" x="557.5" y="106.9063"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="183" x="564.5" y="126.9014">Django API (back.apps.api)</text><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="81" x="815.5" y="134.9014">PostgreSQL</text><path d="M841,85.9063 C841,75.9063 859,75.9063 859,75.9063 C859,75.9063 877,75.9063 877,85.9063 L877,111.9063 C877,121.9063 859,121.9063 859,121.9063 C859,121.9063 841,121.9063 841,111.9063 L841,85.9063 " fill="#FEFECE" style="stroke: #000000; stroke-width: 1.5;"/><path d="M841,85.9063 C841,95.9063 859,95.9063 859,95.9063 C859,95.9063 877,95.9063 877,85.9063 " fill="none" style="stroke: #000000; stroke-width: 1.5;"/><rect fill="#EEEEEE" height="3" style="stroke: #EEEEEE; stroke-width: 1.0;" width="919.5" x="3" y="168.7695"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="168.7695" y2="168.7695"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="171.7695" y2="171.7695"/><rect fill="#EEEEEE" height="23.1328" style="stroke: #000000; stroke-width: 2.0;" width="75" x="425.25" y="158.2031"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="56" x="431.25" y="174.27">Sign up</text><polygon fill="#A80036" points="339,208.4688,349,212.4688,339,216.4688" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="42" x2="345" y1="212.4688" y2="212.4688"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="75" x="159" y="207.4028">Fill the form</text><polygon fill="#A80036" points="644,237.6016,654,241.6016,644,245.6016" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="351" x2="650" y1="241.6016" y2="241.6016"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="116" x="445.5" y="236.5356">POST /api/v1/user/</text><polygon fill="#A80036" points="847,266.7344,857,270.7344,847,274.7344" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="656" x2="853" y1="270.7344" y2="270.7344"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="95" x="710" y="265.6685">Check the mail</text><path d="M13,285.7344 L77,285.7344 L77,292.7344 L67,302.7344 L13,302.7344 L13,285.7344 " fill="#EEEEEE" style="stroke: #000000; stroke-width: 1.0;"/><rect fill="none" height="235.8672" style="stroke: #000000; stroke-width: 2.0;" width="899.5" x="13" y="285.7344"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="19" x="28" y="298.8013">alt</text><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="160" x="92" y="297.9448">[mail already been used]</text><polygon fill="#A80036" points="667,320,657,324,667,328" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="661" x2="858" y1="324" y2="324"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="47" x="734" y="318.9341">Conflict</text><polygon fill="#A80036" points="362,349.1328,352,353.1328,362,357.1328" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="353.1328" y2="353.1328"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="109" x="449" y="348.0669">400 Bad Request</text><polygon fill="#A80036" points="53,378.2656,43,382.2656,53,386.2656" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="47" x2="350" y1="382.2656" y2="382.2656"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="238" x="77.5" y="377.1997">Display "This mail already been used"</text><line style="stroke: #000000; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="13" x2="912.5" y1="391.2656" y2="391.2656"/><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="69" x="18" y="401.4761">[new user]</text><polygon fill="#A80036" points="847,422.2031,857,426.2031,847,430.2031" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="656" x2="853" y1="426.2031" y2="426.2031"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="175" x="670" y="421.1372">Save User (hash password)</text><polygon fill="#A80036" points="667,451.3359,657,455.3359,667,459.3359" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="661" x2="858" y1="455.3359" y2="455.3359"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="53" x="731" y="450.27">Success</text><polygon fill="#A80036" points="362,480.4688,352,484.4688,362,488.4688" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="484.4688" y2="484.4688"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="79" x="464" y="479.4028">201 Created</text><polygon fill="#A80036" points="53,509.6016,43,513.6016,53,517.6016" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="47" x2="350" y1="513.6016" y2="513.6016"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="205" x="94" y="508.5356">Display "Successful registration"</text><rect fill="#EEEEEE" height="3" style="stroke: #EEEEEE; stroke-width: 1.0;" width="919.5" x="3" y="549.168"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="549.168" y2="549.168"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="552.168" y2="552.168"/><rect fill="#EEEEEE" height="23.1328" style="stroke: #000000; stroke-width: 2.0;" width="188" x="368.75" y="538.6016"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="174" x="374.75" y="554.6685">Log in (with SimpleJWT)</text><polygon fill="#A80036" points="339,588.8672,349,592.8672,339,596.8672" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="42" x2="345" y1="592.8672" y2="592.8672"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="100" x="146.5" y="587.8013">Enter identifiers</text><polygon fill="#A80036" points="644,618,654,622,644,626" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="351" x2="650" y1="622" y2="622"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="124" x="441.5" y="616.9341">POST /api/v1/token/</text><polygon fill="#A80036" points="847,647.1328,857,651.1328,847,655.1328" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="656" x2="853" y1="651.1328" y2="651.1328"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="70" x="722.5" y="646.0669">Verify User</text><path d="M13,666.1328 L77,666.1328 L77,673.1328 L67,683.1328 L13,683.1328 L13,666.1328 " fill="#EEEEEE" style="stroke: #000000; stroke-width: 1.0;"/><rect fill="none" height="212.7344" style="stroke: #000000; stroke-width: 2.0;" width="899.5" x="13" y="666.1328"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="19" x="28" y="679.1997">alt</text><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="123" x="92" y="678.3433">[invalid identifiers]</text><polygon fill="#A80036" points="667,700.3984,657,704.3984,667,708.3984" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="661" x2="858" y1="704.3984" y2="704.3984"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="179" x="668" y="699.3325">Not found / Wrong password</text><polygon fill="#A80036" points="362,729.5313,352,733.5313,362,737.5313" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="733.5313" y2="733.5313"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="114" x="446.5" y="728.4653">401 Unauthorized</text><polygon fill="#A80036" points="53,758.6641,43,762.6641,53,766.6641" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="47" x2="350" y1="762.6641" y2="762.6641"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="218" x="87.5" y="757.5981">Display "Email or password wrong"</text><line style="stroke: #000000; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="13" x2="912.5" y1="771.6641" y2="771.6641"/><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="111" x="18" y="781.8745">[valid identifiers]</text><polygon fill="#A80036" points="362,802.6016,352,806.6016,362,810.6016" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="806.6016" y2="806.6016"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="163" x="422" y="801.5356">200 OK {access, refresh}</text><path d="M188,819.6016 L188,844.6016 L514,844.6016 L514,829.6016 L504,819.6016 L188,819.6016 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M504,819.6016 L504,829.6016 L514,829.6016 L504,819.6016 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="305" x="194" y="836.6685">Tokens are stored in localStorage/Cookies/store</text><polygon fill="#A80036" points="53,866.8672,43,870.8672,53,874.8672" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="47" x2="350" y1="870.8672" y2="870.8672"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="141" x="126" y="865.8013">Redirect to main page</text><rect fill="#EEEEEE" height="3" style="stroke: #EEEEEE; stroke-width: 1.0;" width="919.5" x="3" y="906.4336"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="906.4336" y2="906.4336"/><line style="stroke: #000000; stroke-width: 1.0;" x1="3" x2="922.5" y1="909.4336" y2="909.4336"/><rect fill="#EEEEEE" height="23.1328" style="stroke: #000000; stroke-width: 2.0;" width="272" x="326.75" y="895.8672"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="253" x="332.75" y="911.9341">API call with expired access token</text><polygon fill="#A80036" points="644,946.1328,654,950.1328,644,954.1328" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="351" x2="650" y1="950.1328" y2="950.1328"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="281" x="363" y="945.0669">GET /api/v1/user/me/ (expired access token)</text><polygon fill="#A80036" points="362,975.2656,352,979.2656,362,983.2656" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="979.2656" y2="979.2656"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="114" x="446.5" y="974.1997">401 Unauthorized</text><path d="M13,994.2656 L77,994.2656 L77,1001.2656 L67,1011.2656 L13,1011.2656 L13,994.2656 " fill="#EEEEEE" style="stroke: #000000; stroke-width: 1.0;"/><rect fill="none" height="148.4688" style="stroke: #000000; stroke-width: 2.0;" width="751.5" x="13" y="994.2656"/><text fill="#000000" font-family="sans-serif" font-size="13" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="19" x="28" y="1007.3325">alt</text><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="131" x="92" y="1006.4761">[valid refresh token]</text><polygon fill="#A80036" points="644,1028.5313,654,1032.5313,644,1036.5313" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="351" x2="650" y1="1032.5313" y2="1032.5313"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="281" x="363" y="1027.4653">POST /api/v1/token/refresh/ {refresh_token}</text><polygon fill="#A80036" points="362,1057.6641,352,1061.6641,362,1065.6641" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="356" x2="655" y1="1061.6641" y2="1061.6641"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="185" x="411" y="1056.5981">200 OK {new_access_token}</text><polygon fill="#A80036" points="644,1086.7969,654,1090.7969,644,1094.7969" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0;" x1="351" x2="650" y1="1090.7969" y2="1090.7969"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="169" x="419" y="1085.731">Retry the previous request</text><line style="stroke: #000000; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="13" x2="764.5" y1="1099.7969" y2="1099.7969"/><text fill="#000000" font-family="sans-serif" font-size="11" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="148" x="18" y="1110.0073">[expired refresh token]</text><polygon fill="#A80036" points="53,1130.7344,43,1134.7344,53,1138.7344" style="stroke: #A80036; stroke-width: 1.0;"/><line style="stroke: #A80036; stroke-width: 1.0; stroke-dasharray: 2.0,2.0;" x1="47" x2="350" y1="1134.7344" y2="1134.7344"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="285" x="54" y="1129.6685">Forced disconnection (redirect to login page)</text><!--MD5=[e3ed097468cfa25450d1c30c2d8cce95]
+@startuml
+title "Sequencial Diagram \n Authentification"
+
+skinparam style strictuml
+skinparam sequenceMessageAlign center
+
+actor "User" as User
+participant "Angular/Front-end" as Front
+participant "Django API (back.apps.api)" as API
+database "PostgreSQL" as DB
+
+== Sign up ==
+User -> Front: Fill the form
+Front -> API: POST /api/v1/user/
+API -> DB: Check the mail
+
+alt mail already been used
+    DB - -> API: Conflict
+    API - -> Front: 400 Bad Request
+    Front - -> User: Display "This mail already been used"
+else new user
+    API -> DB: Save User (hash password)
+    DB - -> API: Success
+    API - -> Front: 201 Created
+    Front - -> User: Display "Successful registration"
+end
+
+== Log in (with SimpleJWT)==
+
+User -> Front: Enter identifiers
+Front -> API: POST /api/v1/token/
+API -> DB: Verify User
+alt invalid identifiers
+    DB - -> API: Not found / Wrong password
+    API - -> Front: 401 Unauthorized
+    Front - -> User: Display "Email or password wrong"
+else valid identifiers
+    API - -> Front: 200 OK {access, refresh}
+    Note over Front: Tokens are stored in localStorage/Cookies/store
+    Front - -> User: Redirect to main page
+end
+
+== API call with expired access token ==
+Front -> API: GET /api/v1/user/me/ (expired access token)
+API - -> Front: 401 Unauthorized
+
+alt valid refresh token
+    Front -> API: POST /api/v1/token/refresh/ {refresh_token}
+    API - -> Front: 200 OK {new_access_token}
+    Front -> API: Retry the previous request
+else expired refresh token
+    Front - -> User:  Forced disconnection (redirect to login page)
+end
+@enduml
+
+PlantUML version 1.2020.02(Sun Mar 01 11:22:07 CET 2020)
+(GPL source distribution)
+Java Runtime: OpenJDK Runtime Environment
+JVM: OpenJDK 64-Bit Server VM
+Java Version: 21.0.10+7-Ubuntu-124.04
+Operating System: Linux
+Default Encoding: UTF-8
+Language: en
+Country: null
+--></g></svg>
\ No newline at end of file
diff --git a/diagrams/db-diagram.svg b/diagrams/db-diagram.svg
new file mode 100644
index 0000000..10ec156
--- /dev/null
+++ b/diagrams/db-diagram.svg
@@ -0,0 +1,162 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="926px" preserveAspectRatio="none" style="width:1696px;height:926px;" version="1.1" viewBox="0 0 1696 926" width="1696px" zoomAndPan="magnify"><defs/><g><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="141" x="784.5" y="16.708">"  UML Diagram</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="89" x="816.5" y="37.6611">Database"</text><!--MD5=[0d4cad32304a6bb7fe2c1a1b749d579e]
+cluster User Environment--><polygon fill="#DDDDDD" points="656,289.4063,803,289.4063,810,311.7031,1674,311.7031,1674,914.9063,656,914.9063,656,289.4063" style="stroke: #000000; stroke-width: 1.5;"/><line style="stroke: #000000; stroke-width: 1.5;" x1="656" x2="810" y1="311.7031" y2="311.7031"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="14" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="141" x="660" y="304.4014">User Environment</text><!--MD5=[f8e62798a7a96f5d27e760b6601a2e0f]
+cluster Material Assets--><polygon fill="#DDDDDD" points="30,74.4063,157,74.4063,164,96.7031,616,96.7031,616,479.9063,30,479.9063,30,74.4063" style="stroke: #000000; stroke-width: 1.5;"/><line style="stroke: #000000; stroke-width: 1.5;" x1="30" x2="164" y1="96.7031" y2="96.7031"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="14" font-weight="bold" lengthAdjust="spacingAndGlyphs" textLength="121" x="34" y="89.4014">Material Assets</text><!--MD5=[9a9b09fa8617134b1b2615b408c4fd7b]
+class RequestStatus--><rect fill="#F8F8F8" height="91.1875" id="RequestStatus" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="99" x="1488.5" y="799.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="93" x="1491.5" y="816.0449">RequestStatus</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1489.5" x2="1586.5" y1="823.875" y2="823.875"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="50" x="1494.5" y="838.0854">PENDING</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="74" x="1494.5" y="850.8901">PROCESSING</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="68" x="1494.5" y="863.6948">COMPLETED</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="37" x="1494.5" y="876.4995">FAILED</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1489.5" x2="1586.5" y1="883.0938" y2="883.0938"/><!--MD5=[cc4941acd9f25cf973013d8901d108c0]
+class OperationType--><rect fill="#F8F8F8" height="78.3828" id="OperationType" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="97" x="1061.5" y="358.4063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="91" x="1064.5" y="374.5449">OperationType</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1062.5" x2="1157.5" y1="382.375" y2="382.375"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="31" x="1067.5" y="396.5854">CASH</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="30" x="1067.5" y="409.3901">CARD</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="38" x="1067.5" y="422.1948">OTHER</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1062.5" x2="1157.5" y1="428.7891" y2="428.7891"/><!--MD5=[e59cf999063292dce8d6ea34dd10a338]
+class user--><rect fill="#F8F8F8" height="142.4063" id="user" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="229" x="688.5" y="560.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="29" x="788.5" y="577.0449">User</text><line style="stroke: #383838; stroke-width: 1.5;" x1="689.5" x2="916.5" y1="584.875" y2="584.875"/><ellipse cx="699.5" cy="595.875" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="81" x="708.5" y="599.0854">id : UUID «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="689.5" x2="916.5" y1="605.6797" y2="605.6797"/><ellipse cx="699.5" cy="616.6797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="203" x="708.5" y="619.8901">username : varchar(150) «UNIQUE»</text><ellipse cx="699.5" cy="629.4844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="140" x="708.5" y="632.6948">password : varchar(128)</text><ellipse cx="699.5" cy="642.2891" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="176" x="708.5" y="645.4995">email : varchar(254) «UNIQUE»</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="108" x="708.5" y="658.3042">credit : integer = 0</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="87" x="708.5" y="671.1089">is_staff = false</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="120" x="708.5" y="683.9136">is_superuser = false</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="12" x="708.5" y="696.7183">...</text><!--MD5=[b7fdae1517bfb210dbb895153335cd24]
+class operation--><rect fill="#F8F8F8" height="129.6016" id="operation" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="205" x="744.5" y="332.4063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="62" x="816" y="348.5449">Operation</text><line style="stroke: #383838; stroke-width: 1.5;" x1="745.5" x2="948.5" y1="356.375" y2="356.375"/><ellipse cx="755.5" cy="367.375" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="81" x="764.5" y="370.5854">id : UUID «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="745.5" x2="948.5" y1="377.1797" y2="377.1797"/><ellipse cx="755.5" cy="388.1797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="148" x="764.5" y="391.3901">beneficiary_id : UUID «FK»</text><ellipse cx="755.5" cy="400.9844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="118" x="764.5" y="404.1948">agent_id : UUID «FK»</text><ellipse cx="755.5" cy="413.7891" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="179" x="764.5" y="416.9995">operation_type : OperationType</text><ellipse cx="755.5" cy="426.5938" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="119" x="764.5" y="429.8042">amount : integer = 0</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="86" x="764.5" y="442.6089">comment : text</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="126" x="764.5" y="455.4136">created_at : DateTime</text><!--MD5=[d73585d71b2748f54a72687d17b93a91]
+class file--><rect fill="#F8F8F8" height="103.9922" id="file" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="259" x="1031.5" y="579.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="21" x="1150.5" y="596.0449">File</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1032.5" x2="1289.5" y1="603.875" y2="603.875"/><ellipse cx="1042.5" cy="614.875" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="81" x="1051.5" y="618.0854">id : UUID «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="1032.5" x2="1289.5" y1="624.6797" y2="624.6797"/><ellipse cx="1042.5" cy="635.6797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="112" x="1051.5" y="638.8901">user_id : UUID «FK»</text><ellipse cx="1042.5" cy="648.4844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="109" x="1051.5" y="651.6948">path : varchar(100)</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="233" x="1051.5" y="664.4995">number_of_printing : integer = 1 {&gt;= 0}</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="106" x="1051.5" y="677.3042">para_slicer : jsonb</text><!--MD5=[0dbbe5e9e04a32a61f4c8be5c884f575]
+class request--><rect fill="#F8F8F8" height="103.9922" id="request" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="224" x="1426" y="579.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="52" x="1512" y="596.0449">Request</text><line style="stroke: #383838; stroke-width: 1.5;" x1="1427" x2="1649" y1="603.875" y2="603.875"/><ellipse cx="1437" cy="614.875" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="81" x="1446" y="618.0854">id : UUID «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="1427" x2="1649" y1="624.6797" y2="624.6797"/><ellipse cx="1437" cy="635.6797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="103" x="1446" y="638.8901">file_id : UUID «FK»</text><ellipse cx="1437" cy="648.4844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="129" x="1446" y="651.6948">printer_id : Bigint «FK»</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="198" x="1446" y="664.4995">status : RequestStatus = PENDING</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="126" x="1446" y="677.3042">created_at : DateTime</text><!--MD5=[a093872cf1ec41e70f3754a5adcb6f24]
+class printer--><rect fill="#F8F8F8" height="78.3828" id="printer" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="200" x="328" y="123.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="42" x="407" y="140.0449">Printer</text><line style="stroke: #383838; stroke-width: 1.5;" x1="329" x2="527" y1="147.875" y2="147.875"/><ellipse cx="339" cy="158.875" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="86" x="348" y="162.0854">id : Bigint «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="329" x2="527" y1="168.6797" y2="168.6797"/><ellipse cx="339" cy="179.6797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="101" x="348" y="182.8901">type : PrinterType</text><ellipse cx="339" cy="192.4844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="174" x="348" y="195.6948">status : PrinterStatus = DOWN</text><!--MD5=[791dcace3ea863df779aa24bbb1463f1]
+class filament--><rect fill="#F8F8F8" height="91.1875" id="filament" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="194" x="54" y="117.4063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="53" x="124.5" y="133.5449">Filament</text><line style="stroke: #383838; stroke-width: 1.5;" x1="55" x2="247" y1="141.375" y2="141.375"/><ellipse cx="65" cy="152.375" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="86" x="74" y="155.5854">id : Bigint «PK»</text><line style="stroke: #383838; stroke-width: 1.0;" x1="55" x2="247" y1="162.1797" y2="162.1797"/><ellipse cx="65" cy="173.1797" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="112" x="74" y="176.3901">colour : varchar(25)</text><ellipse cx="65" cy="185.9844" fill="#000000" rx="3" ry="3" style="stroke: #000000; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="111" x="74" y="189.1948">type : FilamentType</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="168" x="74" y="201.9995">quantity : integer = 0 {&gt;= 0}</text><!--MD5=[5ec76b4dd5eee3f39e5e62a0e63b8709]
+class FilamentType--><rect fill="#F8F8F8" height="103.9922" id="FilamentType" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="108" x="68" y="345.4063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="82" x="81" y="361.5449">FilamentType</text><line style="stroke: #383838; stroke-width: 1.5;" x1="69" x2="175" y1="369.375" y2="369.375"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="74" y="383.5854">PLA</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="96" x="74" y="396.3901">REINFORCED_PLA</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="30" x="74" y="409.1948">PETG</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="23" x="74" y="421.9995">ABS</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="47" x="74" y="434.8042">TPE/TPU</text><line style="stroke: #383838; stroke-width: 1.5;" x1="69" x2="175" y1="441.3984" y2="441.3984"/><!--MD5=[03ae29fcc56da0431d5f0f8a6ffe3cf3]
+class PrinterType--><rect fill="#F8F8F8" height="116.7969" id="PrinterType" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="103" x="256.5" y="338.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="71" x="272.5" y="355.0449">PrinterType</text><line style="stroke: #383838; stroke-width: 1.5;" x1="257.5" x2="358.5" y1="362.875" y2="362.875"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="21" x="262.5" y="377.0854">SLA</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="22" x="262.5" y="389.8901">SLS</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="23" x="262.5" y="402.6948">FDM</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="19" x="262.5" y="415.4995">MJP</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="31" x="262.5" y="428.3042">DMLS</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="91" x="262.5" y="441.1089">BINDER_JETTING</text><line style="stroke: #383838; stroke-width: 1.5;" x1="257.5" x2="358.5" y1="447.7031" y2="447.7031"/><!--MD5=[e125e6b6b334f8746de43678843fc44e]
+class PrinterStatus--><rect fill="#F8F8F8" height="78.3828" id="PrinterStatus" rx="5" ry="5" style="stroke: #383838; stroke-width: 1.5;" width="89" x="439.5" y="358.4063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="83" x="442.5" y="374.5449">PrinterStatus</text><line style="stroke: #383838; stroke-width: 1.5;" x1="440.5" x2="527.5" y1="382.375" y2="382.375"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="15" x="445.5" y="396.5854">UP</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="34" x="445.5" y="409.3901">DOWN</text><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="31" x="445.5" y="422.1948">USED</text><line style="stroke: #383838; stroke-width: 1.5;" x1="440.5" x2="527.5" y1="428.7891" y2="428.7891"/><!--MD5=[96ff0251488efa8757c6c54b29b18dc5]
+link user to file--><path d="M917.75,631.9063 C917.75,631.9063 1023.36,631.9063 1023.36,631.9063 " fill="none" id="user-&gt;file" style="stroke: #383838; stroke-width: 1.0;"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1023.36" x2="1031.36" y1="631.9063" y2="625.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1023.36" x2="1031.36" y1="631.9063" y2="637.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1023.36" x2="1031.36" y1="631.9063" y2="631.9063"/><ellipse cx="1017.36" cy="631.9063" fill="none" rx="4" ry="4" style="stroke: #383838; stroke-width: 1.0;"/><!--MD5=[6486f9dc58e7fb166fe0bc88a9a3623d]
+reverse link file to request--><path d="M1297.74,631.9063 C1297.74,631.9063 1425.94,631.9063 1425.94,631.9063 " fill="none" id="file&lt;-request" style="stroke: #383838; stroke-width: 1.0;"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1294.74" x2="1294.74" y1="635.9063" y2="627.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1297.74" x2="1297.74" y1="635.9063" y2="627.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="1298.74" x2="1290.74" y1="631.9063" y2="631.9063"/><!--MD5=[ba6b3f2194326762d01c5774aead80d4]
+link Material Assets to User Environment--><path d="M616.0302,397.9063 C616.1072,397.9063 616.1846,397.9063 616.2623,397.9063 C621.2403,397.9063 627.9119,397.9063 634.6863,397.9063 C641.4606,397.9063 648.3378,397.9063 653.727,397.9063 C654.4007,397.9063 655.0511,397.9063 655.6751,397.9063 C655.7531,397.9063 655.8307,397.9063 655.9079,397.9063 " fill="none" id="Material Assets-User Environment" style="stroke: #383838; stroke-width: 1.0;"/><polygon fill="#383838" points="655.9079,397.9063,646.9079,393.9063,650.9079,397.9063,646.9079,401.9063,655.9079,397.9063" style="stroke: #383838; stroke-width: 1.0;"/><polygon fill="#383838" points="616.0302,397.9063,625.0302,401.9063,621.0302,397.9063,625.0302,393.9063,616.0302,397.9063" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="56" x="1446" y="261.4731">Interacts</text><!--MD5=[7af409dccf17333360817820ce2f5532]
+reverse link printer to request--><path d="M535.46,182.9063 C535.46,182.9063 1538,182.9063 1538,182.9063 C1538,182.9063 1538,461.0763 1538,579.5263 " fill="none" id="printer&lt;-request" style="stroke: #383838; stroke-width: 1.0;"/><line style="stroke: #383838; stroke-width: 1.0;" x1="532.46" x2="532.46" y1="186.9063" y2="178.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="535.46" x2="535.46" y1="186.9063" y2="178.9063"/><line style="stroke: #383838; stroke-width: 1.0;" x1="536.46" x2="528.46" y1="182.9063" y2="182.9063"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="65" x="1320" y="401.9731">processes</text><!--MD5=[1a3696dc035b537621fafb7b953fe00d]
+reverse link operation to user--><path d="M831,470.4163 C831,470.4163 831,560.5963 831,560.5963 " fill="none" id="operation&lt;-user" style="stroke: #383838; stroke-width: 1.0;"/><line style="stroke: #383838; stroke-width: 1.0;" x1="831" x2="825" y1="470.4163" y2="462.4163"/><line style="stroke: #383838; stroke-width: 1.0;" x1="831" x2="837" y1="470.4163" y2="462.4163"/><line style="stroke: #383838; stroke-width: 1.0;" x1="831" x2="831" y1="470.4163" y2="462.4163"/><ellipse cx="831" cy="476.4163" fill="none" rx="4" ry="4" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="127" x="826" y="516.9731">beneficiary or agent</text><!--MD5=[7009c16ce8feb5d8ff8493b44df3ad7b]
+link request to RequestStatus--><path d="M1538,684.1363 C1538,684.1363 1538,794.8763 1538,794.8763 " fill="none" id="request-&gt;RequestStatus" style="stroke: #383838; stroke-width: 1.0; stroke-dasharray: 7.0,7.0;"/><polygon fill="#383838" points="1538,799.8763,1542,790.8763,1538,794.8763,1534,790.8763,1538,799.8763" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="30" x="1539" y="755.9731">uses</text><!--MD5=[eaeec2db56ec2c53b8e27be7c9e9a4d9]
+link printer to PrinterStatus--><path d="M483.75,202.1563 C483.75,202.1563 483.75,353.0263 483.75,353.0263 " fill="none" id="printer-&gt;PrinterStatus" style="stroke: #383838; stroke-width: 1.0; stroke-dasharray: 7.0,7.0;"/><polygon fill="#383838" points="483.75,358.0263,487.75,349.0263,483.75,353.0263,479.75,349.0263,483.75,358.0263" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="30" x="457" y="261.4731">uses</text><!--MD5=[c5042109526fce31551e8e4a0dff3bcc]
+link printer to PrinterType--><path d="M343.75,202.1563 C343.75,202.1563 343.75,333.6563 343.75,333.6563 " fill="none" id="printer-&gt;PrinterType" style="stroke: #383838; stroke-width: 1.0; stroke-dasharray: 7.0,7.0;"/><polygon fill="#383838" points="343.75,338.6563,347.75,329.6563,343.75,333.6563,339.75,329.6563,343.75,338.6563" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="30" x="310" y="261.4731">uses</text><!--MD5=[eecdf2e51a0166b8b1a48ee5e84da745]
+link filament to FilamentType--><path d="M122,208.6762 C122,208.6762 122,340.2062 122,340.2062 " fill="none" id="filament-&gt;FilamentType" style="stroke: #383838; stroke-width: 1.0; stroke-dasharray: 7.0,7.0;"/><polygon fill="#383838" points="122,345.2062,126,336.2062,122,340.2062,118,336.2062,122,345.2062" style="stroke: #383838; stroke-width: 1.0;"/><text fill="#000000" font-family="Segoe UI, Arial, sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="30" x="144" y="261.4731">uses</text><!--MD5=[5e0676831950b238ed9917ead78ef924]
+link operation to OperationType--><path d="M949.81,397.9063 C949.81,397.9063 1056.49,397.9063 1056.49,397.9063 " fill="none" id="operation-&gt;OperationType" style="stroke: #383838; stroke-width: 1.0; stroke-dasharray: 7.0,7.0;"/><polygon fill="#383838" points="1061.49,397.9063,1052.49,393.9063,1056.49,397.9063,1052.49,401.9063,1061.49,397.9063" style="stroke: #383838; stroke-width: 1.0;"/><!--MD5=[65ad7c8e4641f0ceeb49c5dcae2cde91]
+@startuml
+title "  UML Diagram \n Database"
+
+hide circle
+skinparam linetype ortho
+skinparam shadowing false
+skinparam roundcorner 10
+skinparam nodesep 80
+skinparam ranksep 80
+skinparam monochrome true
+skinparam backgroundColor white
+skinparam defaultFontName Segoe UI, Arial, sans-serif
+skinparam style strictuml
+
+
+
+
+
+package "User Environment" #DDDDDD{
+
+    enum RequestStatus {
+        PENDING
+        PROCESSING
+        COMPLETED
+        FAILED
+    }
+    enum OperationType {
+        CASH
+        CARD
+        OTHER
+    }
+
+    entity "User" as user {
+      *id : UUID <<PK>>
+      - -
+      *username : varchar(150) <<UNIQUE>>
+      *password : varchar(128)
+      *email : varchar(254) <<UNIQUE>>
+      credit : integer = 0
+      is_staff = false
+      is_superuser = false
+      ...
+    }
+
+    entity "Operation" as operation{
+        *id : UUID <<PK>>
+        - -
+        *beneficiary_id : UUID <<FK>>
+        *agent_id : UUID <<FK>>
+        *operation_type : OperationType
+        *amount : integer = 0
+        comment : text
+        created_at : DateTime
+    }
+    entity "File" as file{
+        *id : UUID <<PK>>
+        - -
+        *user_id : UUID <<FK>>
+        *path : varchar(100)
+        number_of_printing : integer = 1 {>= 0}
+        para_slicer : jsonb
+    }
+
+
+    entity "Request" as request{
+            *id : UUID <<PK>>
+            - -
+            *file_id : UUID <<FK>>
+            *printer_id : Bigint <<FK>>
+            status : RequestStatus = PENDING
+            created_at : DateTime
+    }
+}
+package "Material Assets" #DDDDDD{
+    entity "Printer" as printer {
+            *id : Bigint <<PK>>
+            - -
+            *type : PrinterType
+            *status : PrinterStatus = DOWN
+    }
+
+    entity "Filament" as filament{
+        *id : Bigint <<PK>>
+        - -
+        *colour : varchar(25)
+        *type : FilamentType
+        quantity : integer = 0 {>= 0}
+    }
+
+    enum FilamentType {
+        PLA
+        REINFORCED_PLA
+        PETG
+        ABS
+        TPE/TPU
+    }
+
+    enum PrinterType {
+        SLA
+        SLS
+        FDM
+        MJP
+        DMLS
+        BINDER_JETTING
+    }
+
+    enum PrinterStatus {
+        UP
+        DOWN
+        USED
+    }
+}
+
+
+
+
+file }o-l- user : owns
+file ||-r- request : linked to
+"Material Assets" <- -> "User Environment" : Interacts
+printer ||- - request : processes
+operation }o- - user : beneficiary or agent
+request .d.> RequestStatus : uses
+printer ..> PrinterStatus : uses
+printer ..> PrinterType : uses
+filament ..> FilamentType : uses
+operation .r.> OperationType : uses
+@enduml
+
+PlantUML version 1.2020.02(Sun Mar 01 11:22:07 CET 2020)
+(GPL source distribution)
+Java Runtime: OpenJDK Runtime Environment
+JVM: OpenJDK 64-Bit Server VM
+Java Version: 21.0.10+7-Ubuntu-124.04
+Operating System: Linux
+Default Encoding: UTF-8
+Language: en
+Country: null
+--></g></svg>
\ No newline at end of file