save method
Implementation
Future<bool> save(Token? newToken) async {
bool isSaved = await _cacheService.save(
'token', newToken != null ? jsonEncode(newToken) : null);
if (isSaved) {
this._token = newToken;
notifyListeners();
}
print('isSaved: $isSaved - $newToken');
return isSaved;
}