private function toUserOutput(string $msg) {
    $renderer = new \Nuki\Handlers\Http\Output\Renderers\RawRenderer();
    $response = new \Nuki\Handlers\Http\Output\Response($renderer);

    $renderer->setContent(new \Nuki\Models\IO\Output\Content($msg));

    $response->httpStatusCode(\Nuki\Models\IO\Output\Http::HTTP_EXPECTATION_FAILED);

    $response->send();

    return;
  }