public GameBuilder find_game_by_player_id(Guid player_id)
        {
            using (var session = SessionFactory.GetNewSession())
            {
                _blackjacktablerow = session.Query<BlackJackTableRow>().Where(x => x.player_token == player_id).SingleOrDefault();     
            }

            return this;
        }
        public GameBuilder create_for(Guid player_id)
        {
            _blackjacktablerow = new BlackJackTableRow();
            _blackjacktablerow.id = Guid.NewGuid();
            _blackjacktablerow.cards_dealt = false;
            _blackjacktablerow.hand_rows = new List<HandTableRow>();
            _blackjacktablerow.deck_rows = new List<DeckRow>();
            _blackjacktablerow.player_token = player_id;

            return this;
        }