<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Directory\AuthenticationMethodDevices\HardwareOathDevices\HardwareOathDevicesRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new HardwareOathDevicesRequestBuilderGetRequestConfiguration();
$queryParameters = HardwareOathDevicesRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->filter = "serialNumber eq 'TOTP123456'";
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->directory()->authenticationMethodDevices()->hardwareOathDevices()->get($requestConfiguration)->wait();