code: public function fetchUser(SecurityContextInterface $security, ConfigurationHandler $configurationHandler)
      {
          $user = null;
          if ($configurationHandler->isTheme()) {
              return $user;
          }
  
          $token = $security->getToken();
          if (null !== $token) {
              $user = $token->getUser();
          }
  
          return $user;
      }
docs: Returns the current signed in user
  @param \Symfony\Component\Security\Core\SecurityContextInterface $security
  @param \RedKiteCms\Configuration\ConfigurationHandler $configurationHandler
  
  @return \RedKiteCms\Bridge\Security\User