public function addRootPrivileges()
    {
        if ($this->addRootPrivilegeStatement == null) {
            $this->addRootPrivilegeStatement = $this->connection->prepare("
              INSERT INTO UserPrivileges (username, rootPrivileges, sitePrivileges, pageId) VALUES (?,1,0,NULL)");
        }
        $this->addRootPrivilegeStatement->execute(array($this->user->getUsername()));
        $this->rootPrivilege = 1;
    }