public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
        {
            if (!ModelState.IsValid)
            {   //Modelo valido si se ajusta al modelo establecido
                return View(model);
            }

            // muestra el modelo basico a la hora de logueo (sig in) user,pass,recordar pass y validar si esta bloqueado o no
            
            var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: true);
            // Permitir que los errores de contraseña desencadenen el bloqueo de la cuenta, shouldLockout: true
            switch (result)
            {
                case SignInStatus.Success:
                    return RedirectToLocal(returnUrl); //Llamada de vista exito
                case SignInStatus.LockedOut:
                    return View("Lockout"); //Llamada de vista logkout
                case SignInStatus.RequiresVerification:
                    return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
                case SignInStatus.Failure: // En caso de error lanzar un error, el error se determina si no se ajusta al modelo
                default:
                    ModelState.AddModelError("", "Intento de inicio de sesión no válido.");
                    return View(model);
            }
        }
        public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
        {
            if (!ModelState.IsValid)
            {
                return View(model);
            }

            // This doesn't count login failures towards account lockout
            // To enable password failures to trigger account lockout, change to shouldLockout: true
            var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, shouldLockout: false);
            switch (result)
            {
                case SignInStatus.Success:
                    return RedirectToLocal(returnUrl);
                case SignInStatus.LockedOut:
                    return View("Lockout");
                case SignInStatus.RequiresVerification:
                    return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = model.RememberMe });
                case SignInStatus.Failure:
                default:
                    ModelState.AddModelError("", "Invalid login attempt.");
                    return View(model);
            }
        }