[Error] API rate limit exceeded about spotify-dart HOT 5 CLOSED

static Future<String> getCategoriesId(String categoryName) async {
    try {
      final Iterable<Category> _categories =
          await _spotifyApi.categories.list().all();
      final Iterable<Category> _filteredCategory =
          _categories.where((element) => element.name == categoryName);
      final Category _firstCategory = _filteredCategory.toList()[0];
      return _firstCategory.id;
    } catch (e) {
      Fluttertoast.showToast(msg: 'Failed to get category');
    }
    return null;
  }

  static Future<List<PlaylistSimple>> getPlayLists(String categoryName) async {
    try {
      final String _categoryId = await MusicAPI.getCategoriesId(categoryName);
      final Pages<PlaylistSimple> _recommendations =
          _spotifyApi.playlists.getByCategoryId(_categoryId);
      final Iterable<PlaylistSimple> _playLists = await _recommendations.all();
      return _playLists.toList();
    } catch (e) {
      print(e);
      Fluttertoast.showToast(msg: 'Failed to get playlists');
    }
    return null;
  }

  static Future<List<Track>> getRecommendations(String categoryName) async {
    try {
      final List<PlaylistSimple> _playLists =
          await MusicAPI.getPlayLists(categoryName);
      List<Track> _tracks = [];
      for (PlaylistSimple playList in _playLists) {
        _spotifyApi.playlists.getTracksByPlaylistId(playList.id).all().then(
              (value) => _tracks = value.toList(),
            );
      }
      return _tracks;
    } catch (e) {
      print(e);
      Fluttertoast.showToast(msg: 'Failed to get music tracks');
    }
    return null;
  }```