Microsoft Exam MS-600 Topic 4 Question 58 Discussion

The AadHttpClient client object is useful for consuming any REST API. You can use it to consume Microsoft Graph or any other third-party (or first-party) REST API.

To consume any REST API using the AadHttpClient client object, create a new instance of the AadHttpClient type by calling the context.aadHttpClientFactory.getClient() method and providing the URI of the target service.

https://docs.microsoft.com/en-us/sharepoint/dev/spfx/use-aad-tutorial