@Override
  public DelegationTokenIdentifier createIdentifier() {
    return new DelegationTokenIdentifier();
  }
Create a secret manager
@param delegationKeyUpdateInterval the number of seconds for rolling new
       secret keys.
@param delegationTokenMaxLifetime the maximum lifetime of the delegation
       tokens
@param delegationTokenRenewInterval how often the tokens must be renewed
@param delegationTokenRemoverScanInterval how often the tokens are scanned
       for expired tokens
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/security/DelegationTokenSecretManager.java