/**
  * After a user is authenticated with realme, we attempt to verify the session.
  *
  * @return SS_HTTPResponse
  */
 private function realMeACS()
 {
     $loggedIn = $this->service->enforceLogin();
     if (true === $loggedIn) {
         return $this->owner->redirect($this->service->getBackURL());
     }
     return Security::permissionFailure($this->owner, _t('RealMeSecurityExtension.LOGINFAILURE', 'Unfortunately we\'re not able to log you in through RealMe right now.'));
 }