public function authenticateAsCompanyAdmin(Zend_Db_Adapter_Abstract $db, $companyName) {
        $_SERVER['HTTP_HOST'] = 'localhost';
        $_SERVER['REMOTE_ADDR'] = '127.0.0.1';

        $adminQuery = $db->select()
          ->from(array('m' => 'members'), array('m.username', 'm.password'))
          ->join(array('mt' => 'members_types'), 'mt.member_type_id = m.userType')
          ->join(array('c' => 'company'), 'c.company_id = m.company_id')
          ->where('mt.member_type_name = ?', 'admin')
          ->where('c.companyName = ?', $companyName)
          ->limit(1);
        if (!$admin = $db->fetchRow($adminQuery)) {
            return false;
        }

        $username = $admin['username'];
        $passwordEncrypted = $admin['password'];
        $password = Uniques_Encryption::decode($passwordEncrypted);

        return Auth::getInstance()->login($username, $password, false);
    }