Retrieve user roles

[nazonhou]

Most of the time, when I work with Keycloak, I need to protect some routes or even some parts of my views based on the roles associated to the user on keycloak.

But, unfortunately, we don't have any method or even function to retrieve directly user roles in this package, unless we make some request to keycloak.

I thought that it can be hepful for the community to have such method so I write it. It just decode the access_token to retrieve the user roles.

To decode the token I use the firebase/php-jwt package. But if you don't want more dependency, I can do it by my own.

To decode the token, I use also the realm's public key which the user can provide via the env variable KEYCLOAK_PUBLIC_KEY. But it's optional actually. So, when it's not set, I retrieve it by my own.

I hope that you will appreciate it and please let me know if you find any issue or suggestion on my code.

Regards

[socialiteprovidersbot]

This repository is a READ ONLY subtree split from SocialiteProviders/Providers.

Please open a PR against SocialiteProviders/Providers.