Using await in event sheet to call external JavaScript functions

class YandexSDK {
 constructor () {
 this.ready = new Promise(resolve => this.init = resolve);
 }
 setSDK (ysdk) {
 this.ysdk = ysdk;
 } 
 showFullscreen () {
 this.ready.then(() => this.ysdk.adv.showFullscreenAdv({
	callbacks:{ 
	 onClose: () => {
 console.log('Ad was closed');
 }}}))
 }
 load_player () {
 this.ready.then(() => this.ysdk.getPlayer().then(_player => {
 player = _player;
		console.log('Player Loaded '+ String(player));
		return player;
 }).catch(err => {
 console.log('Error loading player');
 }))
 }
 
};

async function load_player_score(runtime) {
 if (player != null) {
	loaded_stats = await player.getStats();
	console.log("loaded stats: "+loaded_stats.score_save);
	runtime.globalVars.score = loaded_stats.score_save
	console.log("updated score ")
	}}