function curators($slug, Request $request, Application $app)
 {
     if (!$this->build($slug, $request, $app)) {
         $app->abort(404, "curatedlist does not exist.");
     }
     $userAccountRepository = new \org\openacalendar\curatedlists\repositories\UserAccountRepository();
     $this->parameters['curatedlistOwner'] = $userAccountRepository->loadByOwnerOfCuratedList($this->parameters['curatedlist']);
     if ($this->parameters['actionCuratedListEditCurators'] && $request->request->get('CSFRToken') == $app['websession']->getCSFRToken()) {
         if ($request->request->get('submitted') == 'add') {
             $newUser = $userAccountRepository->loadByUserName($request->request->get('userdetails'));
             if ($newUser) {
                 $curatedListRepo = new CuratedListRepository();
                 $curatedListRepo->addEditorToCuratedList($newUser, $this->parameters['curatedlist'], $app['currentUser']);
                 $app['flashmessages']->addMessage("Added");
             } else {
                 $app['flashmessages']->addError("Could not find that user");
                 // TODO put error in form instead, in usual field error place
             }
         } else {
             if ($request->request->get('submitted') == 'remove') {
                 $oldUser = $userAccountRepository->loadByUserName($request->request->get('username'));
                 if ($oldUser) {
                     $curatedListRepo = new CuratedListRepository();
                     $curatedListRepo->removeEditorFromCuratedList($oldUser, $this->parameters['curatedlist'], $app['currentUser']);
                     $app['flashmessages']->addMessage("Removed");
                 }
             }
         }
     }
     $userRepoBuilder = new UserAccountRepositoryBuilder();
     $userRepoBuilder->canEditNotOwnCuratedList($this->parameters['curatedlist']);
     $this->parameters['curatedlistEditors'] = $userRepoBuilder->fetchAll();
     return $app['twig']->render('site/curatedlist/curators.html.twig', $this->parameters);
 }