secureKey function
Implementation
Future<List<int>> secureKey() async {
final encryprionKey = await secureStorage.read(key: storageKey);
if (encryprionKey == null) {
final key = Hive.generateSecureKey();
await secureStorage.write(key: storageKey, value: base64UrlEncode(key));
}
final key = await secureStorage.read(key: storageKey);
final encryptionKey = base64Url.decode(key!);
return encryptionKey;
}