Отрефакторить код

@immutable
class HomePage extends StatefulWidget {
  String? authToken;

HomePage({
    String? authToken,
Key? key,
})  : this.authToken = authToken ?? '',
        super(key: key);

@override
State<HomePage> createState() => _HomePageState(authToken!);
}

class _HomePageState extends State<HomePage> {
  String authToken;
List<String>? items;

_HomePageState(this.authToken);

@override
void initState() {
    super.initState();

    if (items == null && items!.isEmpty) {
      Api().loadData(authToken).then((data) {
        items = data;
});
}
  }

  @override
Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Dashboard'),
),
body: RefreshIndicator(
        onRefresh: () async {
          Api().loadData(authToken).then((value) => items = value);
},
child: Center(
            child: ListView(
              children: [
                for (final item in items!)
                  ListTile(
                    title: Text(item),
),
],
)),
),
);
}
}