Hi @w1ll,
Thanks for reading my article and joining the Auth0 Community.
As mentioned in the article, for a production-ready application you need to implement a caching mechanism for the access token.
As far as I know, this is not related to CallCredentials and GrpcChannel classes. You should implement it in the GetAccessToken() method.
I’m afraid that currently, we have no article showing how to implement this caching mechanism. However, I hope that the approach outlined here is useful for your needs.