我有这个代码，但它不工作，它抛出语法错误，意外的“}”错误

function my_custom_menu_item($items, $args)
{
    if(is_user_logged_in() && $args->theme_location == \'primary\')
    {
        $user=wp_get_current_user();
        $name=$user->display_name; // or user_login , user_firstname, user_lastname
        $items .= \'<li><a href="">Welcome \'.$name.\'</a></li>\';
        $items.= //Change Password, Logout, etc
    }
    elseif (!is_user_logged_in() && $args->theme_location == \'primary\') {
        $items .= \'<li><a href="\'. site_url(\'wp-login.php\') .\'">Log In</a></li>\';
        $items.= //Sign up, Lost Password
    }
    return $items;
}
add_filter( \'wp_nav_menu_items\', \'my_custom_menu_item\');