SignalR Hub not receiving user from client WPF (.netcore 3.1) - wpf

Question

I have a WPF client which connects successfully to a Hub, but I cannot pass the user of the client to the Hub.
My connection.User?.Identity?.Name in my class implementing from IUserIdProvider returns null.
For my WPF client I use this to connect against the Hub:
_connection = new HubConnectionBuilder()
.WithUrl(viewModel.Endpoint, opts =>
{
opts.Credentials = new NetworkCredential("user", "password", "domain");
opts.UseDefaultCredentials = true;
})
.Build();
I have then the following provider registered as singleton:
public class NameUserIdProvider : IUserIdProvider
{
public string GetUserId(HubConnectionContext connection)
{
return connection.User?.Identity?.Name;
}
}
As I mentioned above, the connection.User?.Identity?.Name; is returning null.
I don't know what else I can do to pass the user name from my client (WPF) to my Hub.
By the way, my Startup.cs looks like this:
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddLogging();
services.AddSingleton<IUserIdProvider, NameUserIdProvider>();
services.AddSignalR(hubOptions =>
{
hubOptions.EnableDetailedErrors = true;
});
services.AddScoped<IBuildsService, BuildsService>();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthentication();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapHub<SyncCodeHub>("/signalr");
});
}
Any help would be much appreciated.
EDIT:
I update the code with:
services.AddAuthentication(IISDefaults.AuthenticationScheme);
But the problem continues, the identity user (IUserIdProvider) is returning null when called from the WPF client. I'm running the API locally with IISExpress.
EDIT:
From Microsoft docs:
Windows Authentication is only supported by the browser client when using Microsoft Internet Explorer or Microsoft Edge.
So I'm wondering if this is even possible with an Desktop as a client. I assume it should work, so I'm wondering if I'm still missing a point or if this is a bug related to the Version of SignalR I#m using (3.1.3)

Answer 1

You need to configure your ASP.NET Core app to use Windows authentication by calling AddAuthentication in the ConfigureServices method of the Startup class:
services.AddAuthentication(IISDefaults.AuthenticationScheme);
You should also edit your launchSettings.json file according to the docs:
"iisSettings": {
"windowsAuthentication": true,
"anonymousAuthentication": false,
"iisExpress": {
"applicationUrl": "http://localhost:52171/",
"sslPort": 44308
}
}