hree = THREE;
// Ensure 'three' is defined if needed: three = THREE;

class GeoThreeExtension extends Autodesk.Viewing.Extension {
    constructor(viewer, options) {
      super(viewer, options);
      this.viewer = viewer;
    }
  
    load() {
      var provider = new Geo.DebugProvider();
      var DEV_BING_API_KEY =
        "AuViYD_FXGfc3dxc0pNa8ZEJxyZyPq1lwOLPCOydV3f0tlEVH-HKMgxZ9ilcRj-T";
      var provider = new Geo.BingMapsProvider(
        DEV_BING_API_KEY,
        Geo.BingMapsProvider.ROAD
      );
  
      

      var map = new Geo.MapView(Geo.MapView.PLANAR, provider);
      map.position.set(14900, -27300, -45);
      this.viewer.overlays.addScene("map");
      this.viewer.overlays.addMesh(map, "map");
      map.updateMatrixWorld(false);
  
      this.viewer.autocam.shotParams.destinationPercent = 3;
      this.viewer.autocam.shotParams.duration = 3;
      var cam = this.viewer.getCamera();
  
      var coords = Geo.UnitsUtils.datumsToSpherical(40.940119, -8.535589);
      cam.target.set(coords.x, 0, -coords.y);
      cam.position.set(0, 1000, 0);
  
      this.viewer.addEventListener(Autodesk.Viewing.CAMERA_CHANGE_EVENT, () => {
        this.viewer.autocam.toPerspective();
        map.lod.updateLOD(
          map,
          cam,
          this.viewer.impl.glrenderer(),
          this.viewer.overlays.impl.overlayScenes.map.scene,
          this.viewer.impl
        );
      });
      return true;
    }
  
    unload() {
      return true;
    }
  }
  
  Autodesk.Viewing.theExtensionManager.registerExtension(
    "GeoThreeExtension",
    GeoThreeExtension
  );

This is the custom GeoThreeExtension so instead of DEV_BING_API_KEY ,I have google api key .
so how can i use that in this extension.

I have get this code from the git resource https://github.com/wallabyway/geo-three-ext.
when i used the below GOOGLE_MAPS_API_ instead of DEV_BING_API_KEY

 var GOOGLE_MAPS_API_KEY = "YOUR_GOOGLE_MAPS_API_KEY";
    var provider = new Geo.GoogleMapsProvider(GOOGLE_MAPS_API_KEY);

iam getting errors.

I want to use google api key in the custom GeoThreeExtension .
how can i use that ,Please help me .
iam using autodesk forge viewer

    <script src="https://developer.api.autodesk.com/modelderivative/v2/viewers/7.*/viewer3D.min.js"></script>

Thanks in advance