private List<Genre> GetArtistGenreCollection(int userId)
        {
            var artistGenreRepository = new SqlArtistGenreRepository(ConnectionString);
            var genreRepository = new SqlGenreRepository(ConnectionString);

            var userGenres = artistGenreRepository.GetArtistGenresByArtistId(userId);
            var genres = userGenres.Select(userGenre => genreRepository.Genre.FirstOrDefault(x => x.GenreId == userGenre.GenreId)).ToList();

            return genres;
        }