aMember (site.php): Dynamically override redirect after login URL

site.php

<?php

Am_Di::getInstance()->hook->add(Am_Event::AUTH_GET_OK_REDIRECT, function(Am_Event $e) {
    /* @var $user User */
    $user = $e->getUser();
    if (stripos($e->getReturn(), '/signup') !== false) {
        $e->setReturn($e->getDi()->url('member', false));
    }
});