Postgres issues on Amazon RDS related to pg_authid

[Grant Means]

I just posted the following question on Amazon's forums:

I'm trying to build an Ansible playbook for provisioning Postgres databases on RDS, but ran into an issue while trying to create users. The playbook responds with the following:

psycopg2.ProgrammingError: permission denied for relation pg_authid

From what I've researched, it appears Ansible's postgres module tries to query pg_authid in order to compare passwords to make sure they match. Since pg_authid is shared across a cluster, is this catalog not available to the master user created for the RDS instance?

I was wondering if anyone here has seen the same issue and had any guidance or a workaround?