I want to redirect an anonymous user to the login form if such user encounters a 403 error.

I have created event subscriber and this is my code, but I end up on loop on the current page.

/**    * Redirect anonymous user to login page if he encounters 404 or 403    * response.    *    * @param SymfonyComponentHttpKernelEventGetResponseEvent $response    *   The created response object that will be returned.    * @param string $event    *   The string representation of the event.    * @param DrupalComponentEventDispatcherContainerAwareEventDispatcher $event_dispatcher    *   Event dispatcher that lazily loads listeners and subscribers from the dependency injection    *   container.    */   public function checkLoginNeeded(GetResponseEvent $response, $event, ContainerAwareEventDispatcher $event_dispatcher) {     $routeMatch = RouteMatch::createFromRequest($response->getRequest());     $route_name = $routeMatch->getRouteName();     $is_anonymous = Drupal::currentUser()->isAnonymous();     $is_not_login = $route_name != 'user.login';      if ($is_anonymous && $route_name == 'system.403' && $is_not_login) {       $query = $response->getRequest()->query->all(); //      $query['destination'] = $routeMatch->getRouteObject()->getPath();       $query['destination'] = Drupal::url('<current>');       $login_uri = Drupal::url('user.login', [], ['query' => $query]);       $returnResponse = new RedirectResponse($login_uri, Response::HTTP_FOUND);       $response->setResponse($returnResponse);     }   } 

I think this is related to the fact that the response already contains destination(current uri) and system.404 and system.403 have some high priority that prevent me to override this.