public static void manageAccount(
      String name, String oldPass, String newPass, String newPassCheck) {
    User actualUser = User.findByEmail(session.get("username"));

    // test zhody zadaneho hesla s heslom pouzivatela
    if (!Passwords.matches(oldPass, actualUser.password)) {
      validation.addError("oldPass", "Chybné heslo");
    }

    // test ak bolo zadane nove heslo, ci ma aspon 6 znakov
    if ((!newPass.equals("")) && (newPass.length() < 6)) {
      validation.addError("newPass", "Heslo je krátke, zadajte aspoň 6 znakov");
    }
    // test zhody novych hesiel
    if ((!newPassCheck.equals("") || !newPass.equals("")) && !newPass.equals(newPassCheck)) {
      validation.addError("newPassCheck", "Heslá sa nezhodujú");
    }

    // ak nastala nejaka chyba, zasle sa error a neide sa dalej
    if (validation.hasErrors()) {
      Gson gson = new Gson();
      error(Http.StatusCode.BAD_REQUEST, gson.toJson(validation.errorsMap()));
    }

    actualUser.name = name;

    if (!newPass.equals("")) {
      actualUser.password = Passwords.hashPassword(newPass);
    }
    actualUser.save();
  }
 public static void deleteAccount(String password) {
   checkAuthenticity();
   User user = User.findByEmail(session.get("username"));
   if (Passwords.matches(password, user.password)) {
     user.remove();
     renderJSON("{\"next\":\"" + Router.reverse("Secure.logout").url + "\"}");
   } else {
     validation.addError("password", "Chybné heslo");
     Gson gson = new Gson();
     error(Http.StatusCode.BAD_REQUEST, gson.toJson(validation.errorsMap()));
   }
 }