public static async Task<TwitterListCursored> GetListOwned(this ITwitterSession session, string screenName = "", long userId = 0, int count = 20, long cursor = -1) { var parameters = new TwitterParametersCollection(); parameters.Create(user_id: userId, screen_name: screenName, count: count, cursor: cursor); return await session.GetAsync(TwitterApi.Resolve("/1.1/lists/ownerships.json"), parameters) .ContinueWith(c => c.MapToSingle<TwitterListCursored>()); }