code: public function onKernelRequest(GetResponseEvent $event): void
      {
          if (!$this->scopeMatcher->isContaoMasterRequest($event)) {
              return;
          }
  
          $token = $this->tokenStorage->getToken();
  
          if (null === $token || $this->authenticationTrustResolver->isAnonymous($token)) {
              return;
          }
  
          $user = $token->getUser();
  
          if (!$user instanceof User) {
              return;
          }
  
          $session = $user->session;
  
          if (\is_array($session)) {
              /** @var AttributeBagInterface $sessionBag */
              $sessionBag = $this->getSessionBag($event->getRequest());
              $sessionBag->replace($session);
          }
  
          // Dynamically register the kernel.response listener (see #1293)
          $this->eventDispatcher->addListener(KernelEvents::RESPONSE, [$this, 'onKernelResponse']);
      }
docs: Replaces the current session data with the stored session data.