player.setChannel not working (Embed Twitch)

API
5 
"use strict";

const callAJAX = (props) => {
    const url = props.url,
          method = props.method || "GET",
          type = props.type || "JSON",
          header = props.header
    ;
    
    return new Promise(waitForResult => {
        const xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function() {
            if (this.readyState === 4 && this.status === 200) {
                type === "text" 
                    ? waitForResult(this.response)
                    : waitForResult(JSON.parse(this.response))
                ;
            }
        };
        if (method === "GET") {
            xhttp.open("GET", url, true);
            for (const key in props.header) {
                xhttp.setRequestHeader(key, header[key]);
            }
            xhttp.send();
        }
    });
};

const AJAXProps = {
    url: "https://api.twitch.tv/helix/streams?first=20",
    header: {"client-ID": "2qyh8p71ip7wb5duz7s7j4ctujehqn"} //Api key
};

//Array of users (channels)
var users = ["helanyah", "exbc", "rajobostv", "zorro", "esl_sc2"];

let names = "";
for (let i = 0;  i < users.length; i++) {
    let name = users[i];
    !(names) 
        ? names += name
        : names += `&login=${name}`
    ;
};

// Create Twitch iframe

	var actualStream = "";

	// Embed stream
	var options = {
    width: 1280,
    height: 720,
	channel: actualStream
	};
	
	var player = new Twitch.Player("twitchEmbed", options);
	document.getElementsByTagName("iframe")[0].setAttribute("sandbox", "allow-scripts allow-top-navigation allow-same-origin");
	
// Get users:

function updateStreams() {
	AJAXProps.url = `https://api.twitch.tv/helix/users?login=${names}`;
	callAJAX(AJAXProps).then(allUser => {
		AJAXProps.url = `https://api.twitch.tv/helix/streams?first=20&login=${names}`.replace(/login/g, "user_login"); // Check if users now streaming
		// The names inconsistent, so have to work with user_id
		users.forEach((user, i) => {
			users[i] = allUser.data[i].id;
		});
		callAJAX(AJAXProps).then(onlineUsers => {
			console.log("Check if the given users now streaming", onlineUsers);
			var numberOnline = onlineUsers.data.length;
		
		if (numberOnline > 0) {
			var actualStream = onlineUsers.data[0].user_name;
		}
		
		player.setChannel(actualStream);
		
		});
	});
} setInterval(updateStreams, 6000);
updateStreams();