WHMCS how to check user for authorization?

Question

Network administration

Hello.
Actually, what function will give us a response to whether the user is authorized in front of us or not?

Answer 1

just check availability$_SESSION[ 'uid' ]

Answer 2

I implemented it like this:

define("CLIENTAREA",true);
require("./bill/init.php");
$ca = new WHMCS_ClientArea();

if ($ca->isLoggedIn())
{ ... }