[HttpPost]
    public ActionResult CreateUser(UserModel user)
    {
        //my class libary / entity framework class for a user
        User efUser = new User();
        efUser.Email = user.Email;
        efUser.Username = user.Username;
        efUser.Password = user.Password;

        UserBLL userBLL = new UserBLL();

        //send the method to classlibary / logic layer
        userBLL.CreateUser(efUser);

        return RedirectToAction("Index");
    }