protected function store_match_password($uname, $upass, $usalt) {
		$udata = $this->store->query(
			"SELECT uid, uname " .
				"FROM udata WHERE upass=? LIMIT 1",
			[self::hash_password($uname, $upass, $usalt)]);
		if (!$udata)
			return false;
		return $udata;
	}