Login with twitter is not sending Email

Question

I am trying to implement twitter login in ASP.Net with C#. I want to fetch the registered email address of the twitter user but my code is giving error:

An error occurred while parsing the Twitter response

This might be because dataTable.Rows[0]["email"].ToString() is invalid here. However, other details are being fetched perfectly. Following is my code:

empty = "https://api.twitter.com/1.1/users/show.json";
str = twitterAuth.OAuthWebRequest(TwitterAuth.Method.GET, empty, string.Format("screen_name={0}", screenName));
dataTable = JsonStringToDataTable(str);
objTwitterBO.TwitterUserEmailId = dataTable.Rows[0]["email"].ToString();
objTwitterBO.TwitterUserID = dataTable.Rows[0]["Id"].ToString();
objTwitterBO.TwitterUserPhotoUrl = dataTable.Rows[0]["profile_image_url"].ToString();
objTwitterBO.TwitterUserName = dataTable.Rows[0]["name"].ToString();
objTwitterBO.TwitterUserScreenName = dataTable.Rows[0]["screen_name"].ToString();

Code of OAuthWebRequest is as under:

string empty = string.Empty;
      string str = string.Empty;
        string empty1 = string.Empty;
        if ((method == TwitterAuth.Method.POST || method == TwitterAuth.Method.DELETE ? true : method == TwitterAuth.Method.GET))
        {
            if (postData.Length > 0)
            {
                NameValueCollection nameValueCollection = HttpUtility.ParseQueryString(postData);
                postData = string.Empty;
                string[] allKeys = nameValueCollection.AllKeys;
                for (int i = 0; i < (int)allKeys.Length; i++)
                {
                    string str1 = allKeys[i];
                    if (postData.Length > 0)
                    {
                        postData = string.Concat(postData, "&");
                    }
                    nameValueCollection[str1] = HttpUtility.UrlDecode(nameValueCollection[str1]);
                    nameValueCollection[str1] = TwitterBase.UrlEncode(nameValueCollection[str1]);
                    postData = string.Concat(postData, str1, "=", nameValueCollection[str1]);
                }
                if (url.IndexOf("?") <= 0)
                {
                    url = string.Concat(url, "?");
                }
                else
                {
                    url = string.Concat(url, "&");
                }
                url = string.Concat(url, postData);
                string postDataplus = "&include_email=true";
                url = string.Concat(url, postDataplus);

            }
        }
        Uri uri = new Uri(url);
        string str2 = this.GenerateNonce();
        string str3 = this.GenerateTimeStamp();
        string str4 = base.GenerateSignature(uri, this.ConsumerKey, this.ConsumerSecret, this.Token, this.TokenSecret, this.CallBackUrl, this.OAuthVerifier, method.ToString(), str3, str2, out empty, out str);
        str = string.Concat(str, "&oauth_signature=", TwitterBase.UrlEncode(str4));
        if ((method == TwitterAuth.Method.POST ? true : method == TwitterAuth.Method.DELETE))
        {
            postData = str;
            str = string.Empty;
        }
        if (str.Length > 0)
        {
            empty = string.Concat(empty, "?");
        }
        empty1 = this.WebRequest(method, string.Concat(empty, str), postData);
        return empty1;

Please tell me how to fetch the email address from twitter with this code.

Answer 1

The email address is not available on the users/show endpoint. You need to use the validate_credentials endpoint.