public override void Invoke(AWSCredentials creds, RegionEndpoint region, int maxItems)
        {
            AmazonEC2Config config = new AmazonEC2Config();

            config.RegionEndpoint = region;
            ConfigureClient(config);
            AmazonEC2Client client = new AmazonEC2Client(creds, config);

            DescribeBundleTasksResponse resp = new DescribeBundleTasksResponse();
            DescribeBundleTasksRequest  req  = new DescribeBundleTasksRequest
            {
            };

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

            foreach (var obj in resp.BundleTasks)
            {
                AddObject(obj);
            }
        }