code: protected function processAuth(string $actionName, array $actionArgs): void
      {
          // Lambda
          $callAction = function (string $actionName, array $actionArgs) {
              if (empty($actionArgs)) {
                  $this->ctrl->{$actionName}();
              } else {
                  (new \ReflectionMethod($this->ctrl, $actionName))
                      ->invokeArgs($this->ctrl, $actionArgs);
              }
          };
  
          if (class_exists('\extensions\core\Auth')) {
              $auth = new \extensions\core\Auth($this->ctrl->getRequest());
              $auth->run();
              if ($auth->isValid()) {
                  $callAction($actionName, $actionArgs);
              } else {
                  $auth->onFail();
              }
          } else {
              $callAction($actionName, $actionArgs);
          }
      }
docs: The method calls user auth checking, on successful complition of which
  it invokes the target controller and the onFail method of Auth class in
  other case.
  @param string $actionName The action name of target controller.
  @param mixed[] $actionArgs The action parameters.