* </p>
 * <ul>
 *   <li>{@code S3_ENDPOINT}: The endpoint URL of the S3 service.</li>
 *   <li>{@code S3_ACCESS_KEY}: The access key for authentication.</li>
 *   <li>{@code S3_SECRET_KEY}: The secret key for authentication.</li>
 *   <li>{@code S3_REGION}: The region of the S3 service (default: us-east-1).</li>
 * </ul>
 *
 * <p>

        if (StringUtil.isBlank(secretKey)) {
            throw new CrawlingAccessException(
                    "S3 secret key is blank. Please set the S3_SECRET_KEY environment variable or secretKey parameter.");
        }
        final String region = getInitParameter("region", "us-east-1", String.class);

        try {