Keycloak integration with ASP.NET (MVC), IsAuthenticated is always false

1

I have succesfuly integrated Keycloak into my ASP.NET MVC application like so

            const string persistentAuthType = "keycloak_auth";

            app.SetDefaultSignInAsAuthenticationType(persistentAuthType);
            app.UseCookieAuthentication(new CookieAuthenticationOptions
            {
                AuthenticationType = persistentAuthType,
            });

            // Configure Auth0 authentication
            app.UseOpenIdConnectAuthentication(new OpenIdConnectAuthenticationOptions
            {
                AuthenticationType = "keycloak_auth",
                ClientId = clientId,
                Authority = authorityserver,
                RedirectUri = "http://localhost:13636/home",
                PostLogoutRedirectUri = "http://localhost:13636",
                ClientSecret = clientSecret,
                RequireHttpsMetadata = false,
               
                ResponseType = OpenIdConnectResponseType.Code,
                Scope = "openid profile email",

            });

The test is ok, the Keycloak login page is displayed and i can login to it and it redirects to my /home controller correctly, however in the Home controller, when checking the User.Identity.IsAuthenticated it always return to false;

public class HomeController : BaseController
    {
        public ActionResult Index()
        {
            if (!User.Identity.IsAuthenticated)          // <-- always false
            {
                HttpContext.GetOwinContext().Authentication.Challenge(new AuthenticationProperties
                {
                    RedirectUri = Url.Action("Index", "Home")
                }, "keycloak_auth");
                return new HttpUnauthorizedResult();
            }
            ViewBag.Title = "Home";
            return View();
        }

Why is this? Am I missing something? since it is false, it always calls it back
/home and landing on the same conditions inside the IsAuthenticated (false) thus “crashing” since it overruns stack.

Anyone can help?