public static string ImportGames(VaporStoreDbContext context, string jsonString)
        {
            var builder = new StringBuilder();

            var serializer = JsonConvert.DeserializeObject<ImportGameDTO[]>(jsonString);
            //games, developers,genres,tags
            var listOfGames = new HashSet<Game>();
            var listOfDevelopers = new HashSet<Developer>();
            var listOfGenres = new HashSet<Genre>();
            var listofTags = new HashSet<Tag>();

            foreach (var dto in serializer)
            {
                //74 games, 66 developers, 12 genres and 25 tags.
                bool isDTOValid = IsValid(dto);

                bool flag = dto.Tags.Count > 0;
                bool flagForMissing = dto.Tags == null;

                if (!isDTOValid || !flag || flagForMissing)
                {
                    builder.AppendLine(ErrorMessage);
                    continue;
                }

                var dev = listOfDevelopers.SingleOrDefault(x => x.Name == dto.Developer);
                if (dev == null)
                {
                    dev = new Developer
                    {
                        Name = dto.Developer
                    };
                    listOfDevelopers.Add(dev);
                }

                bool genreFlag = listOfGenres.Any(x => x.Name == dto.Genre);
                if (!genreFlag)
                {
                    var genre = new Genre
                    {
                        Name = dto.Genre
                    };
                    listOfGenres.Add(genre);
                }

                var listOfCurrentTags = new List<Tag>();
                foreach (var tag in dto.Tags)
                {
                    bool tagFlag = listofTags.Any(x => x.Name == tag);

                    if (!tagFlag)
                    {
                        var currentTag = new Tag
                        {
                            Name = tag
                        };
                        listOfCurrentTags.Add(currentTag);
                        listofTags.Add(currentTag);
                    }
                    else
                    {
                        listOfCurrentTags.Add(listofTags.FirstOrDefault(x => x.Name == tag));
                    }
                }

                var parsedDate = DateTime.ParseExact(dto.ReleaseDate, "yyyy-MM-dd", CultureInfo.InvariantCulture);
                var game = new Game()
                {
                    Developer = listOfDevelopers.FirstOrDefault(x => x.Name == dto.Developer),
                    Name = dto.Name,
                    ReleaseDate = parsedDate,
                    Genre = listOfGenres.FirstOrDefault(x => x.Name == dto.Genre),
                    Price = dto.Price,
                    GameTags =
                       listOfCurrentTags
                       .Select(x => new GameTag()
                       {
                           Tag = x
                       })
                       .ToList()
                };
                //Added Dota 2 (Action) with 7 tags
                listOfGames.Add(game);
                string message = $"Added {game.Name} ({game.Genre.Name}) with {game.GameTags.Count()} tags";
                builder.AppendLine(message);
            }

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