I call an await api in SaveHandler but it is not wait response

[wow-prime]

I call an await api in SaveHandler but it is not wait response.
My Code is below:

protected async override void ExecuteSave()
{
base.ExecuteSave();
string strResponseBody = "";
if (Row.StsAdpy == "10")
{
using (HttpClient client = new HttpClient())
{
Dictionary<string, string> formDataDictionary = new Dictionary<string, string>()
{
{"sNumAdpy", Row.NumAdpy }

            };

            client.Timeout = TimeSpan.FromSeconds(300);
       
            var formData = new FormUrlEncodedContent(formDataDictionary);

            using (var response = await client.PostAsync(_config.GetValue<string>("Sbpm") + "FI/ApiPrePaidIns", formData))
            {
                strResponseBody = await response.Content.ReadAsStringAsync();
              

                Row.StsAdpy = "00";

                if (strResponseBody == "")
                    throw new ValidationError("驗收失敗：" + strResponseBody);
                throw new ValidationError("驗收失敗：" + strResponseBody);


            }

        }
}

}

How can I modify it so that I can continue the next action after getting a reply?

[VictorTomaili]

handlers are not support async await. They are chain of methods should run one by one and we don't have async overrides.