Deep Metadata API return null

[Le_Belier_TV]

Hey, i got some “null” on “overwatch” data when i use this code on someone still streaming on Overwatch.
What i need ? Get the hero is actualy playing by the caster.
But if “overwatch is null” i can’t.
Any solution ?
Thx !

	var XML = new XMLHttpRequest();
            var response = null;
            
            XML.open("GET", "https://api.twitch.tv/helix/streams/metadata?user_login=beliertv1");
            XML.setRequestHeader('Client-ID', 'blblblblblblblbl');
            XML.send();
            XML.onload = function () {
              response = JSON.parse(XML.response);
              console.log(response.data[0]);
            }