Adding support for `private_key_jwt` client authentication method?

[Laura Beaufort]

Hi there! Thanks for providing this helpful package.

I was building a prototype for an app that uses an RP that requires the private_key_jwt client authentication method and doesn't support the implicit flow due to security reasons (login.gov).

I made some changes on a forked copy of this repo to support the private_key_jwt client authentication method. Please let me know if you'd like me to put in a pull request with documentation, automated tests, cleaned up code, etc. to support this client authentication method, or if you have any questions!

Thanks again!

[Mateusz Łapsa-Malawski]

Same requirement when integrating with sign-in.service.gov.uk

So a big 👍

[Laura Beaufort]

Hi @akatsoulas thank you for your recent work on this package, and releasing version 4.0.0!

I was wondering if you all are open to me adding a PR to support the private_key_jwt Client Authentication Method. If so, I'd be happy to put one together.

Thanks for considering!