How best to decrypt ID token in session callback

[cameronrdecker]

I'm looking to decrypt the ID token that is sent from Auth0 within the session callback so I can access the custom claims I created and set user roles to the session. I'm having a hard time finding what the best way to do this is. Something to this effect:

callbacks: {
                async session({session, token}) {

                session.accessToken = token.accessToken;
                session.idToken = token.idToken;

                //const tokenDecrypted = decrypt(token.idToken)
                //session.roles = tokenDecrypted.roles

                
            }
}