code: public function execute(Observer $observer) // @codingStandardsIgnoreLine - unused parameter
      {
          if ($this->backendAuthSession->isLoggedIn() == false) {
              return;
          }
  
          if ($this->getFrequency() + $this->getLastUpdate() > time()) {
              return;
          }
  
          $modulePath = $this->moduleRegistry->getPath(ComponentRegistrar::MODULE, 'Fastly_Cdn');
          $filePath = str_replace(['\\', '/'], DIRECTORY_SEPARATOR, "$modulePath/composer.json");
          $composerData = json_decode(file_get_contents($filePath)); // @codingStandardsIgnoreLine - not user controlled
          $currentVersion = !empty($composerData->version) ? $composerData->version : false;
  
          if ($currentVersion) {
              $this->feedFactory->checkUpdate($currentVersion);
          }
  
          $this->setLastUpdate();
      }
docs: Predispatch admin user login success
  
  @param Observer $observer
  @return $this|void