public static string ImportGames(VaporStoreDbContext context, string jsonString)
		{
            var sb = new StringBuilder();
            var games = new List<Game>();

            var gamesDto = JsonConvert.DeserializeObject<ImportGameDto[]>(jsonString);

            foreach (var gameDto in gamesDto)
            {
                if (!isValid(gameDto) || gameDto.Tags.Count == 0)
                {
                    sb.AppendLine("Invalid Data");
                    continue;
                }

                var game = new Game
                {
                    Name = gameDto.Name,
                    Price = gameDto.Price,
                    ReleaseDate = DateTime.ParseExact(gameDto.ReleaseDate, "yyyy-MM-dd", CultureInfo.InvariantCulture)
                };

                var developer = GetDeveloper(context, gameDto.Developer);
                var genre = GetGenre(context, gameDto.Genre);

                game.Developer = developer;
                game.Genre = genre;

                foreach (var currentTag in gameDto.Tags)
                {
                    var tag = GetTag(context, currentTag);

                    game.GameTags.Add(new GameTag
                    {
                        Game = game,
                        Tag = tag
                    });
                }

                games.Add(game);
                sb.AppendLine($"Added {game.Name} ({game.Genre.Name}) with {game.GameTags.Count} tags");
            }

            context.Games.AddRange(games);
            context.SaveChanges();

            return sb.ToString().TrimEnd();
		}

 private static Developer GetDeveloper(VaporStoreDbContext context, string gameDtoDeveloper)
        {
            var developer = context.Developers.FirstOrDefault(x => x.Name == gameDtoDeveloper);

            if (developer == null)
            {
                developer = new Developer
                {
                    Name = gameDtoDeveloper
                };

                context.Developers.Add(developer);
                context.SaveChanges();
            }

            return developer;
        }

        private static Genre GetGenre(VaporStoreDbContext context, string gameDtoGenre)
        {
            var genre = context.Genres.FirstOrDefault(x => x.Name == gameDtoGenre);

            if (genre == null)
            {
                genre = new Genre
                {
                    Name = gameDtoGenre
                };

                context.Genres.Add(genre);
                context.SaveChanges();
            }

            return genre;
        }

        private static Tag GetTag(VaporStoreDbContext context, string gameDtoTag)
        {
            var tag = context.Tags.FirstOrDefault(x => x.Name == gameDtoTag);

            if (tag == null)
            {
                tag = new Tag
                {
                    Name = gameDtoTag
                };

                context.Tags.Add(tag);
                context.SaveChanges();
            }

            return tag;
        }