links=true>$ curl -Huser:jason http://$INGRESS_HOST:$INGRESS_PORT/headers
{
  &#34;headers&#34;: {
    &#34;Accept&#34;: &#34;*/*&#34;,
    &#34;Content-Length&#34;: &#34;0&#34;,
    &#34;User&#34;: &#34;jason&#34;,
    &#34;User-Agent&#34;: &#34;curl/7.58.0&#34;,
    &#34;User-Group&#34;: &#34;admin&#34;,
    ...
    &#34;X-Envoy-Internal&#34;: &#34;true&#34;
  }
}
</code></pre><p>Note the presence of the <code>user-group</code> header with the value derived from the
rule application of the adapter. The ex