@Override
 public void logOut() {
   super.logOut();
   this.accessToken = null;
   this.profiles = null;
   this.isOnline = false;
 }
 @Override
 public void loadFromStorage(Map<String, Object> credentials) {
   super.loadFromStorage(credentials);
   this.accessToken = String.valueOf(credentials.get(storageKeyAccessToken));
 }