title: myMap is there a way to authenticate
body: <p>Is there a way to able to get the data even it was restricted sharing. I'm currently using mymap.</p>
  <pre><code>var  src = &quot;https://www.google.com/maps/d/kml?mid={id}&amp;forcekml=1&quot;
  
  geoXml = new geoXML3.parser({
        map: map,
        infoWindow: infowindow,
        singleInfoWindow: true,
        afterParse: useTheData
       });
       geoXml.parse(src);
        
       function useTheData(doc) {
        var geoXmlDoc = doc[0];
        console.log(geoXmlDoc)
      } 
  </code></pre>
  <p>My error is cors.</p>
  <pre><code>Access to XMLHttpRequest at 'https://www.google.com/maps/d/kml?{id}&amp;forcekml=1' from origin 
  'http://localhost:5501/' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' 
  header is present on the requested resource.
  </code></pre>