ผมต้อง การดึงข้อมูล ClaimsIdentity (ที่เป็น custom) เขียนดึงยังไงได้บ้าง

 var identity = new ClaimsIdentity(new[]
                {
                    new Claim(ClaimTypes.Name, model.UserName),
                    new Claim(ClaimTypes.StreetAddress, "User"),
                    new Claim("LastName", "User Test"),

                }, "TestUser");

                this._auth.SignIn(new AuthenticationProperties
                {
                    IsPersistent = false 
                }, identity);


                var identityAdmin = new ClaimsIdentity(new[]
               {
                    new Claim(ClaimTypes.Name, model.UserName),
                    new Claim(ClaimTypes.StreetAddress, "Admin"),
                    new Claim("LastName", "Admin Test"),

                }, "TestAdmin");

                this._auth.SignIn(new AuthenticationProperties
                {
                    IsPersistent = false
                }, identityAdmin);