mailcow-dockerized/data/web/templates/tfa_keys.twig

<div id="tfa_keys">
  {% if tfa_data.additional %}
    {% for key_info in tfa_data.additional %}
      <form style="display:inline;" method="post">
        <input type="hidden" name="unset_tfa_key" value="{{ key_info.id }}">
        <div style="padding:4px;margin:4px" class="label label-keys label-{% if tfa_id == key_info.id %}success{% else %}default{% endif %}">
          {{ key_info.key_id }}
          <a href="#" style="font-weight:bold;color:white" onClick="$(this).closest('form').submit()">[{{ lang.admin.remove }}]</a>
        </div>
      </form>
    {% endfor %}
  {% endif %}
</div>