def library_remove(song)
      fail ArgumentError, 'Song object required' unless song.is_a?(Song)
      req = { userID: @id,
              songID: song.id,
              albumID: song.album_id,
              artistID: song.artist_id }
      @client.request('userRemoveSongFromLibrary', req)
    end
def library_remove(song)
      fail ArgumentError, 'Song object required' unless song.is_a?(Song)
      req = { userID: @id,
              songID: song.id,
              albumID: song.album_id,
              artistID: song.artist_id }
      @client.request('userRemoveSongFromLibrary', req)
    end
Remove song from user library