Check if user had autologin & if so, logout

Based on the suggestion of @JacobPeattie to use a cookie, I’ve constructed following working solution for this question:

/* LOGIN / LOGOUT */
/* --- */
/* AUTOLOGIN */
if( isset($_GET['username']) ) {
    $user = get_user_by('login', $_GET['username']);

    // Redirect URL //
    if ( !is_wp_error( $user ) ) {
        if ( in_array( 'customer', (array) $user->roles ) ) {
            wp_clear_auth_cookie();
            wp_set_current_user ( $user->ID );
            wp_set_auth_cookie  ( $user->ID );

            wp_redirect( '/lovelists/toon-lovelist/' );

            $autologin = 1;
            setcookie( 'autologin_status', $autologin, time()+31556926 , "/" );
            exit();
        }
    }
}

/* AUTOLOGOUT */
function log_out_user() {
global $wp;
$path = $_SERVER['REQUEST_URI'];
    if ( is_user_logged_in() && $_COOKIE['autologin_status'] == 1 && ( $path == '/lovelists/maak-lovelist/' || $path == '/lovelists/login/' ) ) {
        wp_logout(); // this will logout user
        unset( $_COOKIE['autologin_status'] );
    }
}

add_action( 'init', 'log_out_user' );