Kratos can manage users and groups right? Looks like it requires a database backend today. I have been noodling what a distributed AAA service like kratos mig

Kratos can manage users and groups right? Looks like it requires a database backend today. I have been noodling what a distributed AAA service like kratos might look like--any plans to leverage etcd instead? What about managing auth for (Linux) servers? PAM, sudo, etc?