docs: public static void main(String[] args)
      throws IOException, NoSuchAlgorithmException, InvalidKeyException, XmlPullParserException {
      try {
        /* play.min.io for test and development. */
        MinioClient minioClient = new MinioClient("https://play.min.io:9000", "Q3AM3UQ867SPQQA43P2F",
                                                  "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG");
  
        /* Amazon S3: */
        // MinioClient minioClient = new MinioClient("https://s3.amazonaws.com", "YOUR-ACCESSKEYID",
        //                                           "YOUR-SECRETACCESSKEY");
  
        // Get presigned URL string to download 'my-objectname' in 'my-bucketname' and its life time is one day.
        String url = minioClient.presignedGetObject("my-bucketname", "my-objectname", 60 * 60 * 24);
        System.out.println(url);
      } catch (MinioException e) {
        System.out.println("Error occurred: " + e);
      }
    }