protected virtual void OnSignedOut(SignedOutEventArgs e)
 {
     EventHelpers.Raise(this, SignedOut, e);
 }
        //        LeaderboardWriter _leaderboardWriter = new LeaderboardWriter();
        //        public LeaderboardWriter LeaderboardWriter
        //        {
        //            get
        //            {
        //                return _leaderboardWriter;
        //            }
        //        }
        #endregion

        protected virtual void OnSignedIn(SignedInEventArgs e)
        {
            EventHelpers.Raise(this, SignedIn, e);
        }