presto-hive/src/main/java/io/prestosql/plugin/hive/authentication/NoHiveMetastoreAuthentication.java/NoHiveMetastoreAuthentication/authenticate
class NoHiveMetastoreAuthentication:    @Override
    public TTransport authenticate(TTransport rawTransport, String hiveMetastoreHost, Optional<String> delegationToken)
    {
        checkArgument(!delegationToken.isPresent(), "delegation token is not supported");
        return rawTransport;
    }