public override void Invoke(AWSCredentials creds, RegionEndpoint region, int maxItems)
        {
            AmazonKinesisConfig config = new AmazonKinesisConfig();

            config.RegionEndpoint = region;
            ConfigureClient(config);
            AmazonKinesisClient client = new AmazonKinesisClient(creds, config);

            ListStreamConsumersResponse resp = new ListStreamConsumersResponse();

            do
            {
                ListStreamConsumersRequest req = new ListStreamConsumersRequest
                {
                    NextToken = resp.NextToken
                    ,
                    MaxResults = maxItems
                };

                resp = client.ListStreamConsumers(req);
                CheckError(resp.HttpStatusCode, "200");

                foreach (var obj in resp.Consumers)
                {
                    AddObject(obj);
                }
            }while (!string.IsNullOrEmpty(resp.NextToken));
        }
        /// <summary>
        /// Retrieve a list of the consumers for a Kinesis stream.
        /// </summary>
        /// <param name="client">An initialized Kinesis client object.</param>
        /// <param name="streamARN">The ARN of the stream for which we want to
        /// retrieve a list of clients.</param>
        /// <param name="maxResults">The maximum number of results to return.</param>
        /// <returns>A list of Consumer objects.</returns>
        public static async Task <List <Consumer> > ListConsumersAsync(IAmazonKinesis client, string streamARN, int maxResults)
        {
            var request = new ListStreamConsumersRequest
            {
                StreamARN  = streamARN,
                MaxResults = maxResults,
            };

            var response = await client.ListStreamConsumersAsync(request);

            return(response.Consumers);
        }