public PlayersBuilder find_player_with_id_of(Guid player_id)
        {
            using (var session = SessionFactory.GetNewSession())
            {
                _player_row = session.Query<PlayerTableRow>().Where(x => x.player_token == player_id).SingleOrDefault();
            }

            return this;
        }
        public PlayersBuilder create_player_with_id_of(Guid player_id)
        {
            _player_row = new PlayerTableRow();
            _player_row.player_token = player_id;
            _player_row.dollars_in_pot = 0;
            _player_row.version = 0;

            return this;
        }