private List<Album> GetArtistAlbumCollection(int userId)
        {
            var artistAlbumRepository = new SqlArtistAlbumRepository(ConnectionString);
            var albumRepository = new SqlAlbumRepository(ConnectionString);

            var userAlbums = artistAlbumRepository.GetArtistAlbumsByArtistId(userId);
            var albums = userAlbums.Select(userAlbum => albumRepository.Album.FirstOrDefault(x => x.AlbumId == userAlbum.AlbumId)).ToList();

            return albums;
        }