public async Task AddSongToPlaylist( [Summary("The name of the playlist to add a song to.")] string playlistName, [Summary("URL of the YouTube song to add.")] string url) { if (string.IsNullOrEmpty(playlistName)) { await ReplyAsync("Please provide a playlist name."); return; } if (string.IsNullOrEmpty(url)) { await ReplyAsync("Please provide a YouTube URL."); return; } await _service.AddRadioSong(Context.Message.Author, playlistName, url); }