use twig render for response

src/Application/Actions/User/CreateUserAction.php

@@ -49,7 +49,10 @@ class CreateUserAction extends UserAction
 
         $this->logger->info("User has been created.");
 
-        return $this->respondWithData($user);
+        return $this->twig->render(
+            $this->response, "/user/user_profile.twig",
+            ["user" => $user, "id" => $user->getId()]
+        );
     }
 
 }