presto-hive/src/main/java/io/prestosql/plugin/hive/gcs/GcsAccessTokenProvider.java/GcsAccessTokenProvider/getAccessToken
class GcsAccessTokenProvider:    @Override
    public AccessToken getAccessToken()
    {
        return new AccessToken(nullToEmpty(config.get(GCS_ACCESS_TOKEN_CONF)), EXPIRATION_TIME_MILLISECONDS);
    }