Make an example more realistic

Author: javiereguiluz

rate_limiter.rst

@@ -143,14 +143,19 @@ the number of requests to the API::
 In other scenarios you may want instead to wait as long as needed until a new
 token is available. In those cases, use the ``wait()`` method::
 
-    // src/Controller/LuckyController.php
-    // ...
+    // src/Controller/ApiController.php
+    namespace App\Controller;
+
+    use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+    use Symfony\Component\HttpFoundation\Request;
+    use Symfony\Component\RateLimiter\Limiter;
 
     class ApiController extends AbstractController
     {
-        public function registerUser(LimiterInterface $authenticatedApiLimiter)
+        public function registerUser(Request $request, Limiter $authenticatedApiLimiter)
         {
-            $limiter = $authenticatedApiLimiter->create($request->getClientIp());
+            $apiKey = $request->headers->get('apikey');
+            $limiter = $authenticatedApiLimiter->create($apiKey);
 
             // this blocks the application until the given number of tokens can be consumed
             do {