public static UserInfoModel Login(LoginModel info)
        {
            string url   = "/api/UserInfo/Login";
            string input = JsonConvert.SerializeObject(info);
            RegisteredReturnModel returnModel = ParseResponseJsonContent.ParseObj <RegisteredReturnModel>(RestClientUtil.PostUnToken(url, input), out string msg);

            if (returnModel == null)
            {
                Device.BeginInvokeOnMainThread(() => DependencyService.Get <IToast>().ShortAlert(msg));
            }
            RestClientUtil.Token = returnModel?.Access_token;
            return(returnModel?.UserInfo);
        }