protected void Page_Load(object sender, EventArgs e)
        {
            string     code        = Request.QueryString["code"];
            string     accessToken = GoogleUtil.GetAccessToken(code).Result;
            AccountDTO accountDTO  = GoogleUtil.GetUserInfo(accessToken).Result;

            if (!CheckLogin(accountDTO.Email))
            {
                int idInsert = InsertAccount(accountDTO.Email, accountDTO.Picture, accountDTO.Fullname);
                if (idInsert != -1)
                {
                    accountDTO.AccountID = idInsert;
                    Session["USER"]      = accountDTO;
                    Session["AccountID"] = idInsert;
                }
            }
            Response.Redirect("HomePage.aspx");
        }