Laravel de validation unique de 5 colonnes

laravel la validation de deux colonnes unique

$messages = [
    'data.ip.unique' => 'Given ip and hostname are not unique',
];

Validator::make($data, [
    'data.ip' => [
        'required',
        Rule::unique('servers')->where(function ($query) use($ip,$hostname) {
            return $query->where('ip', $ip)
            ->where('hostname', $hostname);
        }),
    ],
],
$messages
);