Centering pivot point in three.js with OrbitControls autorotate - three.js

Question

I'm loading a .glb model into three.js, and while I have it rotating automatically using OrbitControls, I'm not able to see how to change the pivot point so the rotating model is centered.
I've seen a lot of questions on setting boxes or pivot points with rotation, but not with OrbitControls and autorotate. Is there a way for me to center the imported model using autorotate as per my code below?
var scene = new THREE.Scene();
// Load Camera Perspective
var camera = new THREE.PerspectiveCamera( 25, window.innerWidth / window.innerHeight, 1, 8000 );
camera.position.set( 200, 100, 0 );
// Load a Renderer
var renderer = new THREE.WebGLRenderer({ alpha: false });
renderer.setClearColor( 0xC5C5C3 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
// Load the Orbitcontroller
var controls = new THREE.OrbitControls( camera, renderer.domElement );
camera.position.set( 60, 20, 100 );
controls.update();
controls.autoRotate = true;
controls.minDistance = 700;
controls.maxDistance = 2000;
//controls.update();
// Load Light
var ambientLight = new THREE.AmbientLight( 0xcccccc );
scene.add( ambientLight );
var directionalLight = new THREE.DirectionalLight( 0xffffff );
directionalLight.position.set( 0, 1, 1 ).normalize();
scene.add( directionalLight );
// glTf 2.0 Loader
var loader = new THREE.GLTFLoader();
loader.load( 'BTR.glb', function ( gltf ) {
var object = gltf.scene;
gltf.scene.scale.set( 1, 1, 1 );
gltf.scene.position.x = 0; //Position (x = right+ left-)
gltf.scene.position.y = 0; //Position (y = up+, down-)
gltf.scene.position.z = 0; //Position (z = front +, back-)
scene.add( gltf.scene );
});
function animate() {
// required if controls.enableDamping or controls.autoRotate are set to true
controls.update();
render();
requestAnimationFrame( animate );
}
function render() {
renderer.render( scene, camera );
}
render();
animate();

Answer 1

I think this issue can be solved by setting Controls.target (the focus point) to the center point of your glTF asset. You should be able to do this like so:
var aabb = new THREE.Box3().setFromObject( gltf.scene );
aabb.getCenter( controls.target );
controls.update();
three.js R107

Answer 2

Correct way to set target.
var aabb = new THREE.Box3().setFromObject( gltf.scene );
controls.target.set(aabb.getCenter());
controls.update();
it should take (aab.getCenter()), as it returns a vector3 with 3 axis values. But I found this didn't work for me, so I used the following
let aabb = new THREE.Box3().setFromObject( gltf.scene );
let aabbc = aabb.getCenter()
controls.target.set(aabbc.x, aabbc.y, aabbc.z);
controls.update();
just separating into 3 values, if you ever get stuck just console.log(whateveryourstuckwith) and read through the methods and variables and stuff, really helped me understand Three.js more