Add Legend to WordCloud Visual

Dear Community,

I could create a legend but now I would like to connect my created legend with the legend field.

I have installed the 'powerbi-visuals-utils-chartutils'

I added the following imports:

import { legendInterfaces, legend } from 'powerbi-visuals-utils-chartutils';
import createLegend = legend.createLegend;
import ILegend = legendInterfaces.ILegend;
import LegendDataPoint = legendInterfaces.LegendDataPoint;
import LegendPosition = legendInterfaces.LegendPosition;
import MarkerShape = legendInterfaces.MarkerShape;

In my Class I added the following:

private target: HTMLElement;
private set: VisualSettings;
private legend: ILegend;
private host: IVisualHost;

In the Constructor I added the following:

public constructor(options: VisualConstructorOptions) {
    this.target = options.element;
    this.host = options.host;
    this.legend = createLegend(this.target, false, null, true, LegendPosition.Top);

And finally in the update function:

public update(visualUpdateOptions: VisualUpdateOptions): void {
    this.set = WordCloud.parseSettings(visualUpdateOptions && visualUpdateOptions.dataViews && 
    visualUpdateOptions.dataViews[0]);
    let categoryRole = visualUpdateOptions.dataViews[0].categorical.categories[0];
    let myLegendDataPoints: LegendDataPoint[] = categoryRole.values.map(
            (c, i) => (
                {
                    label: <string>c,
                    color: this.host.colorPalette.getColor(<string>c).value,
                    identity: this.host.createSelectionIdBuilder()
                        .withCategory(categoryRole, i)
                        .createSelectionId(),
                    selected: false,
                    markerShape: MarkerShape.circle
                }
            )
        );   
        this.legend.drawLegend(
            {
                title: `Test Legend`,
                fontSize: 10,
                dataPoints: myLegendDataPoints
            },
            visualUpdateOptions.viewport
        );

Now every time when I start my visual the legend is already visible and the values are the same as in the Category field.

I would like to connect my legend field with my current legend. I am pretty sure that I need to change my implementation from my current legend to achieve my goal.

How do I need to do that?

I hope my question is understandable.

Thank you in advance.