How can I setup CesiumIonSDK for my project?

Hi. I’m building a project using Vue3 and CesiumJS.
I got Cesium Ion SDK with license but I cant figure out how to add its features into my project.

my project is vue-cli based and have installed a cesium npm package (npm i cesium --save).
when i first created my project, i follow instructions from this link

I have tried to replace all files in ./node_modules/cesium/* with the files in Ion SDK’s build folder.
but it didnt work.
Is there any documents or tutorials?

All I need for now is using RectangularSensor.

=== additional info ===
below codes throw an exception.
TypeError: cesium__WEBPACK_IMPORTED_MODULE_19__.RectangularSensor is not a constructor

 var sensor = this.viewer.scene.primitives.add(new Cesium.RectangularSensor({
       modelMatrix: Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(126.867299046443, 37.546365885001)),
       radius: 1000000.0,
       xHalfAngle: Cesium.Math.toRadians(25.0),
       yHalfAngle: Cesium.Math.toRadians(40.0)

Hi there,

I would not recommend copying anything into your node_modules folder manually.

Instead, I would recommend you use the alias webpack option to map "cesium" to the location of your cesium-ion-sdk. Also make sure to adjust any of the cesium paths in the webpack config file to the new location.