<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\OnTokenIssuanceStartCustomExtension;
use Microsoft\Graph\Beta\Generated\Models\HttpRequestEndpoint;
use Microsoft\Graph\Beta\Generated\Models\AzureAdTokenAuthentication;
use Microsoft\Graph\Beta\Generated\Models\CustomExtensionClientConfiguration;
use Microsoft\Graph\Beta\Generated\Models\OnTokenIssuanceStartReturnClaim;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new OnTokenIssuanceStartCustomExtension();
$requestBody->setOdataType('#microsoft.graph.onTokenIssuanceStartCustomExtension');
$requestBody->setDisplayName('onTokenIssuanceStartCustomExtension');
$requestBody->setDescription('Fetch additional claims from custom user store');
$endpointConfiguration = new HttpRequestEndpoint();
$endpointConfiguration->setOdataType('#microsoft.graph.httpRequestEndpoint');
$endpointConfiguration->setTargetUrl('https://authenticationeventsAPI.contoso.com');
$requestBody->setEndpointConfiguration($endpointConfiguration);
$authenticationConfiguration = new AzureAdTokenAuthentication();
$authenticationConfiguration->setOdataType('#microsoft.graph.azureAdTokenAuthentication');
$authenticationConfiguration->setResourceId('api://authenticationeventsAPI.contoso.com/a13d0fc1-04ab-4ede-b215-63de0174cbb4');
$requestBody->setAuthenticationConfiguration($authenticationConfiguration);
$clientConfiguration = new CustomExtensionClientConfiguration();
$clientConfiguration->setTimeoutInMilliseconds(2000);
$clientConfiguration->setMaximumRetries(1);
$requestBody->setClientConfiguration($clientConfiguration);
$claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim1 = new OnTokenIssuanceStartReturnClaim();
$claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim1->setClaimIdInApiResponse('DateOfBirth');
$claimsForTokenConfigurationArray []= $claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim1;
$claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim2 = new OnTokenIssuanceStartReturnClaim();
$claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim2->setClaimIdInApiResponse('CustomRoles');
$claimsForTokenConfigurationArray []= $claimsForTokenConfigurationOnTokenIssuanceStartReturnClaim2;
$requestBody->setClaimsForTokenConfiguration($claimsForTokenConfigurationArray);
$result = $graphServiceClient->identity()->customAuthenticationExtensions()->post($requestBody)->wait();