code: public void onLoggedOut(BoxAuthenticationInfo infoOriginal, Exception ex) {
          BoxAuthenticationInfo info = BoxAuthenticationInfo.unmodifiableObject(infoOriginal);
          Set<AuthListener> listeners = getListeners();
          for (AuthListener listener : listeners) {
              listener.onLoggedOut(info, ex);
          }
      }
docs: Callback method to be called on logout.
  @param infoOriginal the authentication information associated with the user that was logged out.
  @param ex the exception if appliable that caused the logout.