Defines how users authenticate themselves to the server. See the PostgreSQL documentation for pg_hba.conf for details on the expected format of this option. By default, peer based authentication will be used for users connecting via the Unix socket, and md5 password authentication will be used for users connecting via TCP. Any added rules will be inserted above the default rules. If you'd like to replace the default rules entirely, you can use
lib.mkForce in your module.
strings concatenated with "\n"