public function blame(CalendarInterface $calendar)
 {
     $token = $this->securityContext->getToken();
     if (null === $token) {
         throw new \RuntimeException('You must configure a firewall for this route');
     }
     if ($this->securityContext->isGranted('IS_AUTHENTICATED_REMEMBERED')) {
         $calendar->setOwner($token->getUser());
     }
 }