Sometimes when you are testing or setting up a server or just porting things to another server, you just want to install the same set of users as you had before without restoring any databases.
In PostgreSQL, the users (Login Roles) and group roles are stored at the server level and only the permissions to objects are stored at the database level.
Question: How do you restore just the users and roles without having to do a full pg_dumpall of your server?
