<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Users\Item\Authentication\HardwareOathMethods\AssignAndActivateBySerialNumber\AssignAndActivateBySerialNumberPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new AssignAndActivateBySerialNumberPostRequestBody();
$requestBody->setVerificationCode('588651');
$requestBody->setSerialNumber('TOTP123456');
$requestBody->setDisplayName('Amy Masters Token');
$graphServiceClient->me()->authentication()->hardwareOathMethods()->assignAndActivateBySerialNumber()->post($requestBody)->wait();