Add certificate-based authentication to the Microsoft Entra provider.

[digroovio-lumen]

Goals

1. Add support for ClientCertificateCredential from @azure/identity to Entra ID provider.

Non-Goals

No response

Background

For a higher level of security, Microsoft recommends using a certificate (instead of a client secret) as a credential in confidential client applications.

Proposal

Functionality added to Entra ID provider in v5.