code: public function checkEmailAction()
      {
          $email = $this->get('session')->get('fos_user_send_confirmation_email/email');
          $this->get('session')->remove('fos_user_send_confirmation_email/email');
          $user = $this->get('fos_user.user_manager')->findUserByEmail($email);
          if (null === $user) {
              throw new NotFoundHttpException(sprintf('The user with email "%s" does not exist', $email));
          }
          return $this->render('@MikyUser/Frontend/Registration/checkEmail.html.twig', array(
              'user' => $user,
          ));
      }
docs: Tell the user to check his email provider.
  
  @return Response
  
  @throws NotFoundHttpException