I read the Oauth2 docs about auth and tokens.
I'm going to building a services for multiple clients that will use my clover app.
In order to use server to server connections my clients wont want to renew their tokens manually as their service will be on their store front. How do I reliably keep Clover server and my server ( per client ) up to date so they aren't "logged out" and their service can stay up and running for their clients 24/7?