Hi. I am using three.js with angular 10 and have this part of code:

```
update() {
if (this.isUserInteracting === false) {
this.lon += 0.1;
}
this.lat = Math.max(-85, Math.min(85, this.lat));
this.phi = ThreeMath.degToRad(90 - this.lat);
this.theta = ThreeMath.degToRad(this.lon);
this.camera.target.x = 500 * Math.sin(this.phi) * Math.cos(this.theta);
this.camera.target.y = 500 * Math.cos(this.phi);
this.camera.target.z = 500 * Math.sin(this.phi) * Math.sin(this.theta);
this.camera.lookAt(this.camera.target);
this.render();
}
```

The problem is, the camera has no target property. How to set it?