Fix invalid option error

Author: wnelson03

main.py

@@ -20,28 +20,29 @@
 """)
 ans=input("Select Option: ") 
 if ans=="1": 
-    user = input('Provide username: ')
-    password = input('Provide password: ')
-    keyauthapp.login(user,password)
+	user = input('Provide username: ')
+	password = input('Provide password: ')
+	keyauthapp.login(user,password)
 elif ans=="2":
-    user = input('Provide username: ')
-    password = input('Provide password: ')
-    license = input('Provide License: ')
-    keyauthapp.register(user,password,license) 
+	user = input('Provide username: ')
+	password = input('Provide password: ')
+	license = input('Provide License: ')
+	keyauthapp.register(user,password,license) 
 elif ans=="3":
-    user = input('Provide username: ')
-    license = input('Provide License: ')
-    keyauthapp.upgrade(user,license)
+	user = input('Provide username: ')
+	license = input('Provide License: ')
+	keyauthapp.upgrade(user,license)
 elif ans=="4":
-    key = input('Enter your license: ')
-    keyauthapp.license(key)
+	key = input('Enter your license: ')
+	keyauthapp.license(key)
 elif ans !="":
-  print("\n Not Valid Option") 
+	print("\nNot Valid Option") 
+	sys.exit()
 
-print("\n User data: ") 
-print(" Username: " + keyauthapp.user_data.username)
-print(" IP address: " + keyauthapp.user_data.ip)
-print(" Hardware-Id: " + keyauthapp.user_data.hwid)
-print(" Created at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.createdate)).strftime('%Y-%m-%d %H:%M:%S'))
-print(" Last login at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.lastlogin)).strftime('%Y-%m-%d %H:%M:%S'))
-print(" Expires at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.expires)).strftime('%Y-%m-%d %H:%M:%S'))
+print("\nUser data: ") 
+print("Username: " + keyauthapp.user_data.username)
+print("IP address: " + keyauthapp.user_data.ip)
+print("Hardware-Id: " + keyauthapp.user_data.hwid)
+print("Created at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.createdate)).strftime('%Y-%m-%d %H:%M:%S'))
+print("Last login at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.lastlogin)).strftime('%Y-%m-%d %H:%M:%S'))
+print("Expires at: " + datetime.utcfromtimestamp(int(keyauthapp.user_data.expires)).strftime('%Y-%m-%d %H:%M:%S'))