MVC6 OWin Microsoft Identity 自定义验证

            //app.UseIdentity();
            app.UseCookieAuthentication(options => {
                //options.AuthenticationScheme = CookieAuthenticationDefaults.AuthenticationScheme;// "MyCookieMiddlewareInstance";
                options.LoginPath = new PathString("/Account/Unauthorized/");
                options.AccessDeniedPath = new PathString("/Account/Forbidden/");
                options.AutomaticAuthenticate = true;
                options.AutomaticChallenge = true;
            });

using System.Security.Claims;
using Microsoft.AspNet.Authentication.Cookies;
using Microsoft.AspNet.Identity;

        public async Task<IActionResult> Login()
        {
            var claims = new List<Claim>();
            claims.Add(new Claim(ClaimTypes.Name, "Admin"));   // value of this.User.GetUserName() or  this.User.Identity.Name
            claims.Add(new Claim(ClaimTypes.NameIdentifier, "10001"));  // value of  this.User.GetUserId();
            claims.Add(new Claim("SelfDefined1", "value1"));
            var ci = new System.Security.Claims.ClaimsIdentity(claims, IdentityCookieOptions.ApplicationCookieAuthenticationType);
            var cp = new System.Security.Claims.ClaimsPrincipal(ci); 
              
            await HttpContext.Authentication.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, cp );
            return View("Index");
        }

            bool signed = this.User.IsSignedIn();
            string userName = this.User.Identity.Name;
            userName = this.User.GetUserName();