AppsFlyer.initialize({
  devKey: 'YOUR_DEV_KEY',
  appID: 'idXXXXXXXXX', // iOS only, set to your App Store ID
  authorizationTimeout: 60, // iOS only, used to defer the start() process
  debug: true
 });

AppsFlyer.start();

AppsFlyer.requestTrackingAuthorization({ status }) => {
  // For example, status === 3 is "authorized"
});

console.warn('AUTHORIZED: ', AppsFlyer.trackingAuthorizationStatus === 3);

AppsFlyer.fetchAdvertisingIdentifier({ idfa }) => {
  // Use the IDFA (iOS) or AID (Android)
});

AppsFlyer.logEvent('my_event', { param1: 'hello', param2: 'world' });