Cesium Geocoder with load

CesiumJS
1

Hello everyone, I have the isocode of each user’s country and I want it to be displayed in that country when the map is loaded when they log in. I am doing it from coordinates in the sample code below, but I need to specify different zoom in each country. I think I can do it using Geocoder. Can you help me, thanks in advance

 useEffect(() => {
    if (cesiumViewer.current === null && cesiumContainerRef.current) {
      CesiumJs.Ion.defaultAccessToken = `${process.env.NEXT_PUBLIC_CESIUM_TOKEN}`;

      cesiumViewer.current = new CesiumJs.Viewer(cesiumContainerRef.current, {
        requestRenderMode: true,
        geocoder: true,
        navigationHelpButton: false,
        animation: false,
        timeline: false,
        skyBox: false,
        fullscreenButton: false,
        globe: false,
      });
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  useEffect(() => {
    if (isLoaded) return;
    initializeCesiumJs();

    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isLoaded]);
  useEffect(() => {
    if (cesiumViewer.current && selectedCountry) {

      const coordinates = {
        'TR': { longitude: 35.0, latitude: 39.0 }, // Türkiye için örnek koordinatlar
        // Other countries...
      };

      const { longitude, latitude } = coordinates[selectedCountry] || { longitude: 0, latitude: 0 };

      cesiumViewer.current.camera.flyTo({
        destination: CesiumJs.Cartesian3.fromDegrees(longitude, latitude, 900000), 
        duration: 3,
      });
    }
  }, [selectedCountry]);
2 
  useEffect(() => {
    if (cesiumViewer.current && selectedCountry) {
      var geocoderService = new CesiumJs.IonGeocoderService({
        scene: cesiumViewer.current.scene,
      });
      geocoderService.geocode(selectedCountry.split("-")[0]).then(function (result) {
        if (CesiumJs.defined(result) && CesiumJs.defined(result[0])) {
          if (cesiumViewer.current && selectedCountry) {
            console.log(result[0].destination);

            cesiumViewer.current.camera.flyTo({
              destination: result[0].destination,
            });
          }
        }
      });
    }
  }, [selectedCountry]);

You can see this solution