public void ChangePassword(int userID, string newPass)
        {
            UserDAO dao = new UserDAO();
            UserVO vo = GetUser(userID);

            vo.Password = HashPassword(newPass);
            dao.UpdateUser(vo);
        }
        public void UpdateComment(UserVO user)
        {
            UserDAO dao = new UserDAO();

            dao.UpdateUser(user);
        }