<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Groups\Item\DeletePasswordSingleSignOnCredentials\DeletePasswordSingleSignOnCredentialsPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new DeletePasswordSingleSignOnCredentialsPostRequestBody();
$requestBody->setId('314ac440-129f-4cb3-ad61-24ef4a7de1d9');
$graphServiceClient->groups()->byGroupId('group-id')->deletePasswordSingleSignOnCredentials()->post($requestBody)->wait();