C# 使用C登录mint#

我想从mint.com获取一个csv文件，并用C#处理它。我必须登录才能这样做。我遵循了另一篇关于堆栈溢出的文章的建议，并提出了以下代码。不幸的是，我得到的结果不是预期的CSV，而是一个错误页面。有没有洞察到我做错了什么，或者我是如何用另一种方式做这件事的

    string cookieHeader = CookieHeaderFromMintLogin("myusername","mypassword");
    string csvURL = "https://wwws.mint.com/transactionDownload.event?queryNew=&offset=0&filterType=cash&comparableType=8";
    string csv = getResponseWithCookies(csvURL, cookieHeader);

    string CookieHeaderFromMintLogin(string username, string password)
    {

        string formUrl = "https://wwws.mint.com/loginJumper.event"; // NOTE: This is the URL the form POSTs to, not the URL of the form (you can find this in the "action" attribute of the HTML's form tag
        string formBuilId = HttpUtility.UrlEncode("form-NAjKdtCT8Z5SuyDHTsmRREioaCMXVEJZpt8-9oaSMEY");
        string formId = HttpUtility.UrlEncode("mint_auth_mint_com_login_form");
        username = HttpUtility.UrlEncode(username);
        password = HttpUtility.UrlEncode(password);
        string formParams = string.Format("username={0}&password={1}&form_build_id={2}&form_id={3}", username, password, formBuilId,formId);
        WebRequest req = WebRequest.Create(formUrl);
        req.ContentType = "application/x-www-form-urlencoded";
        req.Method = "POST";
        byte[] bytes = Encoding.ASCII.GetBytes(formParams);
        req.ContentLength = bytes.Length;
        using (Stream os = req.GetRequestStream())
        {
            os.Write(bytes, 0, bytes.Length);
        }
        WebResponse resp = req.GetResponse();

        return resp.Headers["Set-cookie"];
    }

    string getResponseWithCookies(string getUrl, string cookieHeader)
    {
        string pageSource;
        WebRequest getRequest = WebRequest.Create(getUrl);
        getRequest.Headers.Add("Cookie", cookieHeader);
        WebResponse getResponse = getRequest.GetResponse();
        using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
        {
            pageSource = sr.ReadToEnd();
        }

        return pageSource;
    }

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错误是什么？@RonBeyer csv的内容是来自mint的页面：也许你转错了方向 对不起！这里有几件事你可以试试：

• 你解决了吗，乔希？您收到的错误表明您没有正确登录。我同意我没有正确登录。我想了解我发布的代码没有正确登录的原因。最后，我放弃了，下载了一个用Python编写的API。好吧，我正在用C#现在，我发现它是基于令牌的身份验证，所以我正在抓取和重用令牌。如果我弄明白了，我会告诉你的。