getValue method

Implementation

Future<String?> getValue(String key) async {
  if (_cache.containsKey(key)) {
    return _cache[key];
  }
  try {
    final value = await SecureStorage.getSecureData(key);
    if (value != null) {
      _cache[key] = value;
      return value;
    }
    return null;
  } catch (e) {
    return null;
  }
}