public function addDatabaseReaderRole($role)
	{
		if (strlen($role) < 1) {
			throw new InvalidArgumentException("Role can't be empty");
		}
		$sec = $this->getSecurity();
		if (in_array($role, $sec->readers->roles)) {
			return true;
		}
		array_push($sec->readers->roles, $role);
		$back = $this->setSecurity($sec);
		if (is_object($back) && property_exists($back, "ok") && $back->ok == true) {
			return true;
		}
		return false;
	}