Add Account Login / Logout Links

<?php
if (is_user_logged_in()) {

$items .= '<li><a href="'. wp_logout_url( get_permalink( woocommerce_get_page_id( 'myaccount' ) ) ) .'">Log Out</a></li>';

}

elseif (!is_user_logged_in()) {

$items .= '<li><a href="' . get_permalink( woocommerce_get_page_id( 'myaccount' ) ) . '">Log In</a></li>';

}

echo $items;

?>