loggin in users programmaticaly

Milingo

Hello, on version 1.6 of vanilla I used to have something like:

function login_to_lussumo($Username, $Password, $path){

use_forum();//use forum db

require('/localhost/site/community/forum/appg/settings.php');
require('/localhost/site/community/forum/appg/init_ajax.php');

$UserMng = $Context->ObjectFactory->NewContextObject($Context, 'UserManager');
$UserMng->ValidateUserCredentials($Username, $Password, false);

setcookie("lussumocookieone", $_SESSION['uid'], time()+2592000, "/");
setcookie("lussumocookietwo", $_SESSION['VerificationKey'], time()+2592000, "/");

use_site();//use site db

return true;

}

it worked beautifully, as soon as one of the users signed in I would call login_to_lussumo with the parameters.
now it seems pretty difficult, I looked at the code but it's really over my head, is there an easy way achieve something as easy as it used to be?
I really don't need jsconnect as the user is already logged in to the main site.
thank you!