<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Users\Item\PendingAccessReviewInstances\PendingAccessReviewInstancesRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new PendingAccessReviewInstancesRequestBuilderGetRequestConfiguration();
$queryParameters = PendingAccessReviewInstancesRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->expand = ["definition"];
$queryParameters->top = 100;
$queryParameters->skip = 0;
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->me()->pendingAccessReviewInstances()->get($requestConfiguration)->wait();