WTGatekeeper.js

var username;

VoxEngine.addEventListener(AppEvents.CallAlerting, function (e) {
	username = e.callerid;
	var call = VoxEngine.callConference("user_" + e.callerid, e.callerid, e.displayName, e.headers);
	VoxEngine.easyProcess(e.call, call, function (c1, c2) {
		e.call.sendMessage(JSON.stringify({
			event: "userconf_connected",
			name: e.callerid
		}));
	});
	e.call.removeEventListener(CallEvents.Disconnected);
	call.removeEventListener(CallEvents.Disconnected); 
	e.call.addEventListener(CallEvents.Disconnected, endSession);
	call.addEventListener(CallEvents.Disconnected, endSession);
});

function endSession(e) {
	Net.httpRequestAsync("https://demos.voximplant.com/walkietalkie/auth.php?action=LEAVE_CONFERENCE&username=" + encodeURIComponent(username))
		.then(function (result) {
			Logger.write(JSON.stringify(result));
		});
	VoxEngine.terminate();
}