code: public function execute()
      {
          $result = $this->resultJsonFactory->create();
          try {
              $activeVersion = $this->getRequest()->getParam('active_version');
              $snippets = $this->config->getVclSnippets(Config::VCL_AUTH_SNIPPET_PATH);
  
              foreach ($snippets as $key => $value) {
                  $name = Config::FASTLY_MAGENTO_MODULE . '_basic_auth_' . $key;
                  $status = $this->api->hasSnippet($activeVersion, $name);
  
                  if ($status == false) {
                      return $result->setData([
                          'status' => false
                      ]);
                  }
              }
  
              return $result->setData([
                  'status' => true
              ]);
          } catch (\Exception $e) {
              return $result->setData([
                  'status'    => false,
                  'msg'       => $e->getMessage()
              ]);
          }
      }
docs: Verifies weather or not auth settings snippet exists on specified Fastly version
  
  @return \Magento\Framework\Controller\Result\Json