Redirect User to custom URL after recurring subscription cancelation

site.php

<?php

if (($u = Am_Di::getInstance()->auth->getUser()) &&
    ($url = Am_Di::getInstance()->store->get("cancel-redirect.{$u->pk()}"))) {

        Am_Di::getInstance()->store->set("cancel-redirect.{$u->pk()}", null);
        Am_Mvc_Response::redirectLocation($url);
}


Am_Di::getInstance()->hook->add(Am_Event::INVOICE_AFTER_CANCEL, function(Am_Event $e) {
    $invoice =  $e->getInvoice();
    if ($e->getDi()->auth->getUserId() == $invoice->user_id) {
        $e->getDi()->store->set("cancel-redirect.{$invoice->user_id}", '/some/url', '+ 5 minute');
    }
});