public IEnumerable <BoardGamePlay> GetBoardGamePlays()
        {
            var plays = _boardGameRepository.GetAllPlays();
            var games = _boardGameRepository.GetBoardGames(plays.Select(i => i.BoardGameId)).ToList();

            var missingIds = plays.Select(p => p.BoardGameId).Except(games.Select(g => g.Id)).ToList();

            games.AddRange(missingIds.Select(id => new BoardGame {
                Id = id, Title = $"Board Game {id} loading..."
            }));


            foreach (var a in missingIds.Distinct().OrderBy(a => a))
            {
                Console.WriteLine(a);
            }

            _boardGameRepository.StoreUnknownIds(missingIds);

            return(plays.Select(play => new BoardGamePlay {
                Play = play, BoardGame = games.SingleOrDefault(g => g.Id == play.BoardGameId)
            }));
        }