<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Users\UsersRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new UsersRequestBuilderGetRequestConfiguration();
$queryParameters = UsersRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->count = true;
$queryParameters->filter = "not isof('microsoft.graph.agentUser')";
$queryParameters->select = ["displayName"];
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->users()->get($requestConfiguration)->wait();