flutter GetStorage null

main.dart

  import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:storagecont/storage_controller.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  
  StorageController.init().then((value) {
   
    _getSavedLocale();
    
    runApp(GetMaterialApp(
      home: WowCardApp(),
    ),);
    
  });
}

class WowCardApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Column(
        children: [
          RaisedButton(child: Text("get"), onPressed: () {
            _getSavedLocale();
          }),
          RaisedButton(child: Text("set"), onPressed: () {
            StorageController().setLocale("en");
          }),
          Text("suleyman"),
        ],
      ),
    );
  }
}

Locale _getSavedLocale() {
  final String savedLocale = StorageController().getlocale();
  final locale = (savedLocale == 'en')
      ? const Locale('en', 'US')
      : const Locale('ar', 'AE');
  return locale;
}

storage_controller.dart

import 'package:get_storage/get_storage.dart';

class StorageController {
  static Future<bool> init() async {
    return await GetStorage.init().then((value) => value);
  }

  String getlocale() {
    return  GetStorage().read('locale') ?? '';
  }

  Future<void> setLocale(String newLocale)async {
    GetStorage().write('locale', newLocale);
    return true;
  }
}