Etsy oauth认证c#RestSharp

我正在尝试在他们的文档中提供样本授权请求(或任何需要身份验证的Etsy api).我得到的响应是"oauth_problem = token_rejected".

我用这个苏答案与沿OAuth的基础是benSharper挂钩.

我看着这个和这个,和其他人.其中一个使用https://sandbox.https://openapi.etsy.com/v2,当我尝试时,例外是"底层连接已关闭:无法建立SSL/TLS安全通道的信任关系." 我部署到我的服务器(这是https),仍然是相同的响应.

似乎无法让它发挥作用.我错过了什么？

这是我的代码:

public class AuthorizedRequestHelper
    {
        string baseUrl = "https://openapi.etsy.com/v2";
        string relativePath = "/oauth/scopes";
        string oauth_consumer_key = "xxx";
        string consumerSecret = "xxx";
        string oauth_token = "xxx";
        string oauth_token_secret = "xxx";

        public void test()
        {
            var restClient = new RestClient(baseUrl);
            OAuthBase oAuth = new OAuthBase();

            string nonce = oAuth.GenerateNonce();
            string timeStamp = oAuth.GenerateTimeStamp();
            string normalizedUrl;
            string normalizedRequestParameters;

            string sig = oAuth.GenerateSignature(new Uri(baseUrl + relativePath), oauth_consumer_key, consumerSecret, oauth_token, oauth_token_secret, "GET", timeStamp, nonce, out normalizedUrl, out normalizedRequestParameters);


            var request = new RestRequest(relativePath);
            request.Resource = string.Format(relativePath);
            request.Method = Method.GET;

            request.AddParameter("oauth_consumer_key", oauth_consumer_key);
            request.AddParameter("oauth_token", oauth_token);
            request.AddParameter("oauth_nonce", nonce);
            request.AddParameter("oauth_timestamp", timeStamp);
            request.AddParameter("oauth_signature_method", "HMAC-SHA1");
            request.AddParameter("oauth_version", "1.0");
            request.AddParameter("oauth_signature", sig);

            IRestResponse irestResponse = restClient.Execute(request);
            var content = irestResponse.Content;
            // content = oauth_problem=token_rejected
        }
    }  

任何帮助将不胜感激.