addTrack method
Adds a track with trackUri
(i.e spotify:track:4iV5W9uYEdYUVa79Axb7Rh)
to a playlist with playlistId
Implementation
Future<void> addTrack(String trackUri, String playlistId,
{int position = -1}) async {
var url = 'v1/playlists/$playlistId/tracks';
if (position >= 0) {
url = '$url?position=$position';
}
await _api._post(
url,
jsonEncode({
'uris': [trackUri]
}));
}