public function addHistoryEntry($employeeId, $requestId, string $date, string $note)
    {
        $xml = "
            <history>
                <date>{$date}</date>
                <eventType>used</eventType>
                <timeOffRequestId>{$requestId}</timeOffRequestId>
                <note>{$note}</note>
            </history>
        ";

        $this->put("employees/{$employeeId}/time_off/history", $xml);
    }