Getting Microsoft.VisualStudio.Services.Common.VssUnauthorizedException: 'VS30063 when trying to lauch in local IIS - asp.net-core

Question

im running a simple web application testing out the TeamFoundation.Services.Client along side VisualStudio.Services.Common and launching the app via IIS Express is no problem but when I try to do the same using Local IIS I get this error:
Microsoft.VisualStudio.Services.Common.VssUnauthorizedException: 'VS30063: You are not authorized to access http://mytfs:8080.
This exception was originally thrown at this call stack:
Microsoft.VisualStudio.Services.Common.VssHttpMessageHandler.SendAsync(System.Net.Http.HttpRequestMessage, System.Threading.CancellationToken)
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
Microsoft.VisualStudio.Services.Common.VssHttpRetryMessageHandler.SendAsync(System.Net.Http.HttpRequestMessage, System.Threading.CancellationToken)
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task)
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
System.Net.Http.HttpClient.FinishSendAsyncBuffered(System.Threading.Tasks.Task<System.Net.Http.HttpResponseMessage>, System.Net.Http.HttpRequestMessage, System.Threading.CancellationTokenSource, bool)
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
...
[Call Stack Truncated]
I don't understand what the problem is.
This is the debug profile in which im trying to launch it:
This is the code where I get the error:
internal const string vstsCollectioUrl = "http://myTFS:8080/tfs/MyCollection";
//Prompt user for credential
VssConnection connection = new VssConnection(new Uri(vstsCollectioUrl), new VssAadCredential("{user}", "{password}"));
//create http client and query for resutls
WorkItemTrackingHttpClient witClient = connection.GetClient<WorkItemTrackingHttpClient>();

Answer 1

The VssAadCredential class by default takes the credentials of the person running the tool and does not honor the username and password parameters actually in .net core projects, similar to this ticket. So you can't use Azure Active Directory Authentication like this, and it's not recommended to use AAD Authentication for REST services in SOAP service.
As a workaround you can try windows Authentication:
VssConnection connection = new VssConnection(new Uri("http://instanceName:8080/tfs/OrgName/"), new WindowsCredential(new NetworkCredential("xxx", "xxx")));