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

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

            ListLocationsResponse resp = new ListLocationsResponse();

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

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

                foreach (var obj in resp.Locations)
                {
                    AddObject(obj);
                }
            }while (!string.IsNullOrEmpty(resp.NextToken));
        }
        /// <summary>Snippet for ListLocationsAsync</summary>
        public async Task ListLocationsRequestObjectAsync()
        {
            // Snippet: ListLocationsAsync(ListLocationsRequest, CallSettings)
            // Create client
            LocationsClient locationsClient = await LocationsClient.CreateAsync();

            // Initialize request argument(s)
            ListLocationsRequest request = new ListLocationsRequest {
                Name = "", Filter = "",
            };
            // Make the request
            PagedAsyncEnumerable <ListLocationsResponse, Location> response = locationsClient.ListLocationsAsync(request);

            // Iterate over all response items, lazily performing RPCs as required
            await response.ForEachAsync((Location item) =>
            {
                // Do something with each item
                Console.WriteLine(item);
            });

            // Or iterate over pages (of server-defined size), performing one RPC per page
            await response.AsRawResponses().ForEachAsync((ListLocationsResponse page) =>
            {
                // Do something with each page of items
                Console.WriteLine("A page of results:");
                foreach (Location item in page)
                {
                    // Do something with each item
                    Console.WriteLine(item);
                }
            });

            // Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
            int             pageSize   = 10;
            Page <Location> singlePage = await response.ReadPageAsync(pageSize);

            // Do something with the page of items
            Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
            foreach (Location item in singlePage)
            {
                // Do something with each item
                Console.WriteLine(item);
            }
            // Store the pageToken, for when the next page is required.
            string nextPageToken = singlePage.NextPageToken;
            // End snippet
        }