getItem method

Implementation

@override
JWK? getItem() {
  try {
    if (storage.has(_key)) {
      final storedValue = storage.get(_key);
      return JWK.fromJson(storedValue!);
    }
    return null;
  } catch (e) {
    debugPrint('❌ [$runtimeType] getItem error: $e');
    return null;
  }
}