case S3:
        case S3_COMPAT:
        default:
            return new S3StorageClient(endpoint, accessKey, secretKey, bucket, fessConfig.getStorageRegion());
        }
    }

    /**
     * Creates a StorageClient using the default FessConfig.
     *
     * @return configured StorageClient
     */
    public static StorageClient createClient() {

    }

    default void setStorageRegion(final String value) {
        setSystemProperty(Constants.STORAGE_REGION, value);
    }

    default String getStorageRegion() {
        return getSystemProperty(Constants.STORAGE_REGION, "us-east-1");
    }

    default void setStorageProjectId(final String value) {
        setSystemProperty(Constants.STORAGE_PROJECT_ID, value);

        form.storageBucket = fessConfig.getStorageBucket();
        form.storageType = fessConfig.getStorageType();
        form.storageRegion = fessConfig.getStorageRegion();
        form.storageProjectId = fessConfig.getStorageProjectId();
        form.storageCredentialsPath = fessConfig.getStorageCredentialsPath();
        form.ragLlmName = fessConfig.getRagLlmName();