private function check_authorizations()
 {
     if (!OnlineAuthorizationsService::check_authorizations()->read()) {
         $error_controller = PHPBoostErrors::user_not_authorized();
         DispatchManager::redirect($error_controller);
     }
 }
 public function is_displayed()
 {
     return !Url::is_current_url('/online/') && OnlineAuthorizationsService::check_authorizations()->read();
 }