How to get user jwt token

I’m trying to use GenericOAuthenticator to authentify my user with my OIDC provider.
My OIDC provider can authentify my users and currently only authentified users can access to my Jupyterhub.
Now I would like to authorize only the authentified users having some values in there profile.
Profile information are sent into the JWT token of the users when OIDC provider has authentified them.
How to get the JWT token ? Is it possible from check_allow method ?
Thanks and Regards

If you have oauthenticator 16, then check_allowed will be passed the auth_state dict, which can contain the oauth reply.