code: public function login(array $options)
      {
          $response = null;
          $template = 'RedKiteCms/Resources/views/Security/Login/login-form.html.twig';
          if ($options["is_ajax"]) {
              $response = new Response();
              $response->setStatusCode('403');
  
              return $response;
          }
  
          $params['target'] = '/backend/' . $options["red_kite_cms_config"]->homepagePermalink();
          $params['error'] = $options["error"];
          $params['last_username'] = $options["last_username"];
          $params['template_assets_manager'] = $options["template_assets"];
          $params['template_assets_manager']->add($options["assets"]);
  
          return $options["twig"]->render($template, $params, $response);
      }
docs: Implements the action to sign in to the CMS backend
  @param array $options
  
  @return \Symfony\Component\HttpFoundation\Response