public function getConcrete5ProfileURL($user)
    {
        $result = null;
        $binding = $this->getBindingForUser($user);
        if ($binding !== null) {
            $concrete5UserID = (int) $binding;
            if ($concrete5UserID !== 0) {
                $result = "https://www.concrete5.org/profile/-/view/$concrete5UserID/";
            }
        }

        return $result;
    }