import 'package:flutter_secure_storage/flutter_secure_storage.dart'; class KeyChain { final FlutterSecureStorage _storage = const FlutterSecureStorage(); Future read(String key) { return _storage.read(key: key); } Future write(String key, String value) { return _storage.write(key: key, value: value); } Future delete(String key) { return _storage.delete(key: key); } Future clear() { return _storage.deleteAll(); } }