public ActionResult Registro(CustomerModel customer)
        {
            try
            {
                List <CustomerModel> loginCustomer = CustomerModel.LoginCustomer(customer.Email, customer.ContrasenaEmail);

                if (CustomerModel.ExisteCustomer(customer))
                {
                    AddAlertMessage("El correo ingresado, ya se encuentra registrado.");
                    return(RedirectToAction("Registro", "Login"));
                }
                else
                {
                    if (customer.ContrasenaEmail != customer.ConfirmaContrasena)
                    {
                        AddAlertMessage("Las contraseñas no coinciden.");
                        return(RedirectToAction("Registro", "Login"));
                    }
                    else
                    {
                        CustomerModel.AgregarCustomer(customer);
                        AddAlertMessage("Se ha agregado correctamente.");
                        return(RedirectToAction("Login", "Login"));
                    }
                }
            }
            catch (Exception ex)
            {
                AddAlertMessage("Error, intente mas tarde. Detalles: " + ex.Message);
                return(RedirectToAction("Login", "Login"));
            }
        }