/// <summary>
 ///Returns a collection of users who can contribute to the specified account.
 /// </summary>
 /// <param name="oAuth"></param>
 /// <returns></returns>
 public JArray GetUsers_Contributors(oAuthTwitter oAuth, string user_id)
 {
     Users objUser = new Users();
     JArray jarrUser = new JArray();
     jarrUser = objUser.Get_Users_Contributors(oAuth, user_id);
     return jarrUser;
 }