@Override
 public void generateToken(VerificationToken verificationToken) {
   verificationToken.setExpiredTime(
       LocalDateTime.now().plusSeconds(VerificationToken.EXPIRED_PERIOD));
   String unhashedToken =
       verificationToken.getEmail() + verificationToken.getType() + LocalDateTime.now();
   String token = VerificationTokenUtil.getHash(unhashedToken, VerificationTokenUtil.SHA_256);
   verificationToken.setToken(token);
 }