public async Task <PlaylistDetailsDto> GetPlaylistDetails(Guid playlistId, CancellationToken ct)
        {
            var playlist = await _playlistRepository.GetByIdAsync(playlistId, ct);

            if (playlist == null)
            {
                return(null);
            }

            var audios = await _audioRepository.GetAudioEntriesByPlaylistAsync(playlistId, ct);

            var owner = await _userRepository.FindByIdAsync(playlist.OwnerId.ToString(), ct);

            var playlistDto = _mapper.Map <PlaylistDetailsDto>(playlist);

            playlistDto.AudioEntries  = audios;
            playlistDto.OwnerUsername = owner?.UserName;

            return(playlistDto);
        }
 public Task <Playlist> GetPlaylistAsync(Guid playlistId, CancellationToken ct)
 {
     return(_playlistRepository.GetByIdAsync(playlistId, ct));
 }