public function setPassword($user, $password, $algorithm = self::ALG_MD5, array $options = null)
    {
        $this->load();
        $new = !isset($this->users[$user]);
        if ($new) {
            $oUser = new User($user);
            $oUser->setPassword($password, $algorithm, $options);
            $this->users[$user] = $oUser;
        } else {
            $this->users[$user]->setPassword($password, $algorithm, $options);
        }
        return $new;
    }