public void Setup()
        {
            var config = new ConfigurationBuilder()
                         .AddJsonFile("appsettings.json")
                         .Build();
            var accessKeyId     = config["AWS:AccessKeyId"];
            var secretAccessKey = config["AWS:SecretAccessKey"];

            S3Client   = new AmazonS3Client(accessKeyId, secretAccessKey, RegionEndpoint.USEast2);
            s3Endpoint = new S3Endpoint(S3Client);
        }