Google drive api 如何使用OAuthParameters创建GoogleDriveService的对象

我可以使用oAuth授权我的应用程序（作为回报，我可以获得访问令牌和密码）。我使用它们来实例化OauthParameter的对象。我的问题是，我在身份验证期间添加了“google drive”的作用域。如何创建DriveService的对象，就像创建PicasService一样

PicasaService service;
GOAuthRequestFactory requestFactory;
string Picasa_CONSUMER_KEY = "<CONSUMER KEY>";
static string Picasa_CONSUMER_SECRET = "<CONSUMER SECRET>";
public static string Picasa_SCOPE = "http://picasaweb.google.com/data/https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/drive.file https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile";
string Picasa_CALLBACK_URL = "<CALLBACK URL>";

现在我如何“参数”来实例化DriveService的对象？？ 由于我已经拥有Google Drive的作用域，并且在身份验证过程中收到了token、secret，所以我不想单独为Google Drive执行oAuth

谢谢 苏吉特

OAuthParameters parameters = new OAuthParameters()
            {
                ConsumerKey = Picasa_CONSUMER_KEY,
                ConsumerSecret = Picasa_CONSUMER_SECRET,
                Token = "token received during authentication", 
                TokenSecret = "secret received during authentication"
            };

requestFactory = new GOAuthRequestFactory("XYZ", "XYZ APP", parameters);
service = new PicasaService(requestFactory.ApplicationName);
service.RequestFactory = requestFactory;