def load_songs
      @songs = []
      playlist = @client.request('getPlaylistByID', playlistID: @id)
      @songs = playlist['songs'].map! do |s|
        Song.new(s)
      end if playlist.key?('songs')
      @songs
    end
def load_songs
      @songs = []
      playlist = @client.request('getPlaylistByID', playlistID: @id)
      @songs = playlist['songs'].map! do |s|
        Song.new(s)
      end if playlist.key?('songs')
      @songs
    end
Fetch playlist songs