在Twitter Statuss API上使用GET时Unity出现401

Question

在Unity中测试this API的GET请求时遇到问题，出现401状态（未经授权）错误。

这是我用来通过StartCoroutine()调用IEnumerator的代码。

IEnumerator GetTweets()
{

    using (UnityWebRequest www = UnityWebRequest.Get("https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=twitterapi&count=2"))
    {
        Hashtable headers = new Hashtable();
        www.SetRequestHeader("Authorization", "OAuth oauth_consumer_key=\"MY_CONSUMER_KEY\"," +
                             "oauth_token=\"MY_TOKEN"," +
                             "oauth_signature_method=\"HMAC-SHA1\"," +
                             "oauth_timestamp=\"TIMESTAMP\"," +
                             "oauth_nonce=\"generated-nonce\"," +
                             "oauth_version=\"1.0\"," +
                             "oauth_signature=\"MY_SIGNATURE\"");
        yield return www.SendWebRequest();

        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.responseCode);
            Debug.Log(www.error);
        }
        else
        {
            // Show results as text
            Debug.Log(www.downloadHandler.text);
            Response tr = Response.CreateFromJSON(www.downloadHandler.text);
            int index = Random.Range(0, tr.statuses.Length - 1);
            Debug.Log("title is: " + tr.statuses[index].text);

            // Or retrieve results as binary data
            byte[] results = www.downloadHandler.data;
        }
    }
}

有趣的事实是：
-当我更改https://api.twitter.com/1.1/search/tweets.json?q=nasa中的url时，我完全没有错误！
-当我使用"..statuses/user_timeline.." api时在邮递员中，一切正常。

外面有人可以帮助我吗？ （：祝你愉快！