Update docApi.md

dmnverifierapi/docApi.md

@@ -53,11 +53,12 @@ Root path: <code>/api</code>
 <h3>Metrics</h3>
 
 <h4>Get some statistics about execution times</h4>
+The token parameter is optional for some metric statistics. The default value is 'all'.
 <ul>
   <li>GET</li>
   <li>
     <code><a href="/api/dmn/verification/metrics"
-             target="_blank">/api/dmn/verification/metrics</a></code>
+             target="_blank">/api/dmn/verification/metrics?token={token}</a></code>
   </li>
   <li>Produces: application/json</li>
 </ul>