Adding location picker of mapbox in html

I want to add a map in my html website where by default user current location will be shown on the map. But user can adjust its location on map.

Here is the code :-

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Locate the user</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.2.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.2.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
 <body>
<div id="map"></div>
<script>
    mapboxgl.accessToken = 'pk.eyJ1IjoicmVldDA3IiwiYSI6ImNrZnhwd2k4NTJxcjIyeXBhdmlhZXViMGkifQ.RpDVVS8IaoOn3srMpLmS8w';
var map = new mapboxgl.Map({
    container: 'map', // container id
    style: 'mapbox://styles/mapbox/streets-v11',
    center: [-96, 37.8], // starting position
    zoom: 3 // starting zoom
});

// Add geolocate control to the map.
map.addControl(
    new mapboxgl.GeolocateControl({
        positionOptions: {
            enableHighAccuracy: true
        },

        trackUserLocation: true
     })
  );
 </script>
 </body>
 </html>

I am getting my current location through it. But I am not finding how to adjust our location on this.