C# 4.0 尝试以编程方式登录时出现错误的门路径错误

在尝试以编程方式执行登录方法时，我遇到了一个错误的网关。我创建了开发人员帐户，工作正常，然后突然遇到了错误的网关。我还尝试创建另一个用户并使用它，但不可能

我的登录码

private static string LoginDocuSign()
        {
            string headerDetails = String.Empty;
            string responseMessage = string.Empty;
            WebResponse response = null;
            StreamReader responseStream = null;
            HttpWebRequest request = null;

            try
            {
                Credentials credentials = new Credentials()
                    {
                        Username = "XYZ@gmail.com",
                        Password = "*****",
                        IntegratorKey = "MIND-*****-cac5-47dd-9a7e-6bfb66e6d110"

                    };
                headerDetails = JsonConvert.SerializeObject(credentials);
                string loginUrl = "https://demo.docusign.net/restapi/v2/login_information";

                request = (HttpWebRequest)WebRequest.Create(loginUrl);
                request.Method = "GET";
                request.ContentType = "application/json";
                request.Accept = "application/json";
                request.Headers.Add("X-DocuSign-Authentication", headerDetails);

                response = request.GetResponse();
                responseStream = new StreamReader(response.GetResponseStream());
                responseMessage = responseStream.ReadToEnd();
                responseStream.Close();
                return responseMessage;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

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你能提供那种登录方式吗？除了C之外，你在用什么？这是一个ASP.NET项目吗？你能告诉我们一点你在哪里得到错误的代码吗？用我的代码中使用的登录名编辑了我的帖子。上面发布的代码在几天内运行良好，我已经成功地在电子邮件下创建了用户。然后突然我开始出现错误的网关。