public void logoutUser() {
    session.setLogin(false);

    mDb.deleteUsers();
    mDb.deleteShipments();
    mDb.deleteFarmers();

    // Launching the login activity
    Intent intent = new Intent(getActivity(), LoginActivity.class);
    startActivity(intent);
    getActivity().finish();
  }
  private void logoutUser() {
    session.setLogin(false);
    session.setEmail(null);
    session.setPublics(null);
    session.setUsername(null);
    session.setId(null);

    // Launching the login activity
    Intent intent = new Intent(Register.this, Accueil.class);
    startActivity(intent);
    finish();
  }