Unable to create polygon graphic using SketchViewModel() in arcgis js 4.11 - arcgis-js-api

Question

I am using vuejs as my frontend framework and esri-loader to load arcgis js 4.11 in vue.I am beginner in arcgis js api and trying to use SketchViewModel to draw a polygon. However, when I use create() function, I am getting sketchVM.create is not a function as error.
I followed arcgis js 4.11 SketchViewModel's documentation
I have divided the code for arcgis js in two methods:- one method is responsible for loading map and view, and another is used to draw polygon.
views/mapView.vue
<script>
...
draw(){
loadModules(
[
"esri/layers/GraphicsLayer",
"esri/widgets/Sketch/SketchViewModel",
"esri/geometry/geometryEngine"
],
{
url: "https://js.arcgis.com/4.11/" // use a specific version
}
).then(
([
SketchViewModel,
geometryEngine,
GraphicsLayer
]) => {
console.log("Area section active")
this.view.surface.style.cursor = "crosshair"; // change cursor style to crosshair
this.graphicsLayer = new GraphicsLayer();
// needed to sketch polygon
var sketchVM = new SketchViewModel({
layer: this.graphicsLayer, // graphics layer over which polygon will be added
view: this.view, // view where polygon will be rendered
updateOnGraphicClick: true, // to allow graphic updation on through click event
defaultUpdateOptions:{
tool:'reshape', // this will set reshape as default tool for update event
},
polygonSymbol: { // style and type for polygon symbol
type: "simple-fill",
color: "rgba(138,43,226, 0.8)",
style: "solid",
outline: {
color: "white",
width: 1
}
}
});
sketchVM.on("create", (event)=>{
if(event.state === "complete"){
console.log(geometryEngine.planarArea(this.graphicsLayer.graphics.items[0].geometry, "square-meters"))
}
});
sketchVM.on("update", (event)=>{
// if() // event to remove graphic on pressing delete key
console.log("Updated value state : ",event.state)
});
console.log("drawing mode on")
sketchVM.create("polygon", {mode:"click"}); // getting error at this line
console.log("draw view returned")
return this.view;
}
);
},
...
</script>