Simple test exception help & other questions

[Exergist]

Hey Michiel I'm trying to migrate to the newer HueApi content and I'm running into an issue.

using HueApi.Models;
using HueApi.Models.Requests;
using HueApi.ColorConverters.Original.Extensions;

...

 public async void SimpleTest()
 {
     var bridge = (await new HueApi.BridgeLocator.LocalNetworkScanBridgeLocator().LocateBridgesAsync(TimeSpan.FromSeconds(15))).ToList()[0]; // Find (first) Hue Bridge
     var registrationResult = HueApi.LocalHueApi.RegisterAsync(bridge.IpAddress, "MyApp", "MyDevice", true).Result; // Attempt to register application with first Hue Bridge found
     var ip = registrationResult.Ip;
     var key = registrationResult.StreamingClientKey;
     if (ip == null || key == null) // Check if application registration was NOT successful (key data is NOT valid)
         return;
     Console.WriteLine($"Bridge IP Address = {ip}");
     Console.WriteLine($"Application Key = {key}");
     var localHueClient = new HueApi.LocalHueApi(ip, key); // Connect application as client to Hue Bridge

    // Ideally the connection gets verified here

     // Get light information
     var lights = await localHueClient.GetLightsAsync(); // Get data for all lights from Hue Bridge
     var id = lights.Data.Last().Id; // Pick a light from all retrieved lights

     // Turn one light red
     var req = new UpdateLight()
       .TurnOn()
       .SetColor(new HueApi.ColorConverters.RGBColor("FF0000"));
     var result = await localHueClient.UpdateLightAsync(id, req);
     await Task.Delay(TimeSpan.FromSeconds(5));
 }

My bridge is found without issue. After pressing the 'Link' button on the bridge, a key (which is 32 alphanumeric characters) is generated. Any idea what I'm doing wrong?

Here are the error message details:

System.UnauthorizedAccessException
  HResult=0x80070005
  Message=Attempted to perform an unauthorized operation.
  Source=HueApi
  StackTrace:
   at HueApi.BaseHueApi.<ProcessResponseAsync>d__142`1.MoveNext()
   at HueApi.BaseHueApi.<HueGetRequestAsync>d__138`1.MoveNext()
   at HueApiInterface.HueLightControl.<SimpleTest>d__20.MoveNext()