public function challengeException(Request $request, \Exception $previous) {
$site_config = $this->configFactory->get('system.site');
$site_name = $site_config->get('name');
public function challengeException(Request $request, \Exception $previous) {
$site_config = $this->configFactory->get('system.site');
$site_name = $site_config->get('name');