HELP- functions.enfold.php code

Hi!

I was trying to edit my password protected page and was using the code listed in this forum
https://kriesi.at/support/topic/password-protected-page/

function my_login_logo() { ?>
    <style type="text/css">
        body.login div#login h1 a {
            background-image: url(https://kriesi.at/themes/wp-content/plugins/avia_cachable_style_switch/images/logo-enfold/splash-orange.png);
            padding-bottom: 30px;
        }
    </style>
<?php }
add_action( 'login_enqueue_scripts', 'my_login_logo' );

I added this to the bottom of the functions.enfold.php code and when I pressed updated my website is saying server error 500. Did I do something wrong? Please help! I cannot login my WordPress site