Controll your Spotify Connect Speakers using Scriptable.
let Spotify = importModule('lib.spotify')
const client = new Spotify('client_id', 'client_secret');
await client.init();
const devices = await client.devices();
const testDevice = devices.find(e => e.name === 'Schlafzimmer');
await testDevice.volume(10);
await testDevice.play('spotify:track:0ZZ8VoqXHmTtS6EDmkIxbP');