Context.User.Identity.Name is null with SignalR 2.X.X. How to fix it?

just make sure auth. configuration is called befor start app.MapMignalrR()

i changed this

 public partial class Startup
{
    public void Configuration(IAppBuilder app)
    {
        app.MapSignalR();
        ConfigureAuth(app);



    }
}

to this

 public partial class Startup
{
    public void Configuration(IAppBuilder app)
    {
        ConfigureAuth(app);
        app.MapSignalR();


    }
}

hugs ..

I found the final solution, this is the code of my OWIN startup class:

        public void Configuration(IAppBuilder app)
        {
        app.MapSignalR();

        // Enable the application to use a cookie to store information for the signed i user
        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Home/Index")
        });

        // Use a cookie to temporarily store information about a user logging in with a third party login provider
        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
        app.UseMicrosoftAccountAuthentication(new MicrosoftProvider().GetAuthenticationOptions());
        app.UseTwitterAuthentication(new TwitterProvider().GetAuthenticationOptions());
        app.UseFacebookAuthentication(new FacebookProvider().GetAuthenticationOptions());
        app.UseGoogleAuthentication(new GoogleProvider().GetAuthenticationOptions());    
    }

Making myself some coffee, I thought "What about mapping SignalR AFTER the authentication, and voila! Now it's workign as expected.

        public void Configuration(IAppBuilder app)
        {
        // Enable the application to use a cookie to store information for the signed i user
        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Home/Index")
        });

        // Use a cookie to temporarily store information about a user logging in with a third party login provider
        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
        app.UseMicrosoftAccountAuthentication(new MicrosoftProvider().GetAuthenticationOptions());
        app.UseTwitterAuthentication(new TwitterProvider().GetAuthenticationOptions());
        app.UseFacebookAuthentication(new FacebookProvider().GetAuthenticationOptions());
        app.UseGoogleAuthentication(new GoogleProvider().GetAuthenticationOptions());

        app.MapSignalR();    
    }

If you're mapping /signalr as a 'branched pipeline' you need to do this. Make sure to use bp.UseCookieAuthentication and not app:

app.Map("/signalr", bp =>
{
   bp.UseCookieAuthentication(new CookieAuthenticationOptions
   {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        LoginPath = new PathString("/store/youRaccount/login")
   });

Tip: I deliverately changed the casing so when I see youRaccount in the URL bar I know it worked :-)

If you're using Web Api and SignalR in the same project, you have to map SignalR before registering Web Api.

Change this:

app.UseWebApi(GlobalConfiguration.Configuration);
app.MapSignalR();

To this:

app.MapSignalR();
app.UseWebApi(GlobalConfiguration.Configuration);