/// <summary>
        /// Create piranha User when user is login from external mean like Google
        /// </summary>
        /// <param name="user">Piranha.Entities.User</param>
        /// <returns></returns>
        private User CreateNewUser(Piranha.Entities.User user)
        {
            //get piranha Group
            Group group = null;

            using (var db = new Piranha.DataContext())
            {
                string groupName = GetInitialGroupName();
                group = db.Groups.Where(g => g.Name == groupName).FirstOrDefault();
            }
            user.GroupId = group.Id;
            if (!String.IsNullOrEmpty(user.Password))
            {
                user.Password = Piranha.Models.SysUserPassword.Encrypt(user.Password);
            }
            return(user);
        }
        /// <summary>
        /// Login with Google account
        /// </summary>
        /// <param name="userModel"></param>
        /// <returns></returns>
        public ActionResult ExternalLogin(Piranha.Entities.User userModel)
        {
            if (ModelState.IsValid)
            {
                Piranha.Models.LoginModel loginModel = new LoginModel();
                User user = GetUserByName(userModel.Login);
                loginModel.Login    = userModel.Login;
                loginModel.Password = userModel.Password;
                if (user == null)
                {
                    if (AllowGoogleLogin())
                    {
                        user = CreateNewUser(userModel);
                        using (var db = new Piranha.DataContext())
                        {
                            // Login sysuser into the current context.
                            db.LoginSys();
                            db.Users.Add(user);
                            if (db.SaveChanges() > 0)
                            {
                                return(Login(loginModel));
                            }
                        }
                    }
                }
                else
                {
                    //log he in using his gmail account -- user existed in our system

                    return(Login(loginModel));
                }
            }
            else
            {
                return(RedirectToAction("Login"));
            }
            return(Redirect("~/"));
        }