public async static Task<TwitterResponseCollection<Tweet>> GetUserTimeline(this ITwitterSession session, string screenName = "", long userId = 0, long sinceId = 0, long maxId = 0, int count = 200, bool excludeReplies = true, bool includeRetweets = true)
{
var parameters = new TwitterParametersCollection();
parameters.Create(include_entities: true, include_rts: true, count: count, since_id: sinceId, max_id: maxId, screen_name:screenName);
return await session.GetAsync(TwitterApi.Resolve("/1.1/statuses/user_timeline.json"), parameters)
.ContinueWith(c => c.MapToMany<Tweet>());
}