public function rejectEventRegistrationRequest()
 {
     try {
         $data = $this->getJsonRequest();
         if (!$data) {
             return $this->serverError();
         }
         $request_id = (int) $this->request->param('REQUEST_ID');
         $this->event_registration_request_manager->rejectEventRegistration($request_id, $data, Director::absoluteURL('community/events/'));
         return $this->updated();
     } catch (NotFoundEntityException $ex1) {
         SS_Log::log($ex1, SS_Log::WARN);
         return $this->notFound($ex1->getMessage());
     } catch (EntityValidationException $ex2) {
         SS_Log::log($ex2, SS_Log::WARN);
         return $this->validationError($ex2->getMessages());
     } catch (Exception $ex) {
         SS_Log::log($ex, SS_Log::ERR);
         return $this->serverError();
     }
 }