startOrResumePlayback method
Starts or resumes playback on the user's active device.
Optionally targets a specific deviceId.
Implementation
Future<void> startOrResumePlayback({String? deviceId}) async {
final uri = Uri.https(
_baseApiHost,
'/v1/me/player/play',
deviceId != null ? {'device_id': deviceId} : null,
);
await _putJson(uri);
}