FeatureLayer with Tokens

[JeffBoyton]

I am connection to a Map Service that requires a token and this code works to get the list of layers (where url is something like http://myhost/arcgis/rest/services/MapServer?token=abcdefg😞

using (var client = new HttpClient())
{
    client.BaseAddress = new Uri(url + "&f=pjson");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    return client.GetAsync("").Result;
}

I then want to go through each layer and add it as a feature layer to a map (where layerUrl looks like  http://myhost/arcgis/rest/services/MapServer/5?token=abcdefg)

Uri serviceUri = new Uri(layerUrl);
FeatureLayer layer = new FeatureLayer(serviceUri);

await layer.LoadAsync();
Map.OperationalLayers.Add(layer);

This does not seem to be working.  I am getting no errors, but the layer is also showing no features.  Is it obvious what I am doing wrong?

[Marc_Alx]

As of 200.8.1 you should switch to the following method:

1. Implement IHttpMessageInterceptor

public class MyInterceptor: IHttpMessageInterceptor {
   public Task<HttpResponseMessage> SendAsync(HttpMessageInvoker invoker, HttpRequestMessage message, CancellationToken cancellationToken)
   {
        //work with message here (to add token in RequestUri...)
        return invoker.SendAsync(message, cancellationToken);
   }
}

2. Resgister your interceptor at ArcGIS initialization:

ArcGISRuntimeEnvironment.Initialize((conf) => {
  conf.ConfigureHttp((httpConf)=>httpConf.UseHttpMessageInterceptor(new MyInterCeptor()));
});