@Override
 @Transactional(readOnly = true)
 public Optional<VerificationToken> getToken(VerificationToken token) {
   return verificationTokenDao.getToken(token);
 }
 @Override
 @Transactional(readOnly = true)
 public boolean isPresent(VerificationToken verificationToken) {
   Optional<VerificationToken> token = verificationTokenDao.getToken(verificationToken);
   return token.isPresent();
 }