/// <summary>
        /// HttpClientFactory使用
        /// </summary>
        /// <returns></returns>
        public IActionResult HttpClientFactoryGet()
        {
            //1.默认使用
            var client = _httpClient.CreateClient();

            //2.通过http-client名字创建,名字在startup中指定
            client = _httpClient.CreateClient("github");
            //3.使用自定义的HttpClient类
            _gitHubClient.GetData();

            client.BaseAddress = new Uri("");
            client.PostAsync("/", new StringContent("", Encoding.UTF8, "application/json"));
            return(Ok());
        }