title: Flutter - facebook app events android error
body: <p>I install the package facebook_app_events version <strong>0.13.5</strong> that includes the latest facebook sdk. The problem is that when I try to log an event or get an anonymous Id it throws a kotlin exception.
  I upgrade my kotlin version to 1.5.31 also I try with flutter clean.</p>
  <p>This is my code, I initialize FacebookAppEvent at the top of my widget like the code example.</p>
  <pre><code>facebookAppEvents.logEvent(
    name: 'button_clicked',
    parameters: {
      'button_id': 'registe_buttonr',
     },
  );
  </code></pre>
  <p>This is the error:</p>
  <pre><code>E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052): kotlin.UninitializedPropertyAccessException: lateinit property anonymousId has not been initialized
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at id.oddbit.flutter.facebook_app_events.FacebookAppEventsPlugin.handleGetAnonymousId(FacebookAppEventsPlugin.kt:82)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at id.oddbit.flutter.facebook_app_events.FacebookAppEventsPlugin.onMethodCall(FacebookAppEventsPlugin.kt:55)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:84)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:865)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at android.os.MessageQueue.nativePollOnce(Native Method)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at android.os.MessageQueue.next(MessageQueue.java:335)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at android.os.Looper.loop(Looper.java:206)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at android.app.ActivityThread.main(ActivityThread.java:8595)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at java.lang.reflect.Method.invoke(Native Method)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
  E/MethodChannel#flutter.oddbit.id/facebook_app_events(16052):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)```
  </code></pre>