{% if googleanalytics_measurement_id %}
<script async src="https://www.googletagmanager.com/gtag/js?id={{ googleanalytics_measurement_id }}"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', '{{ googleanalytics_measurement_id }}'{% if googleanalytics_user_id %},{'user_id': '{{ googleanalytics_user_id }}'}{% endif %});
</script>
{% endif %}