Pretty sure the only way to add someone to the `cloudsqlsuperuser` role is via the GCP GUI to add a new role, gcloud's capability to do this, or via the GCP API (through something like Terraform). To the best of my knowledge, when you do that a role ...

There are other implications with this that I haven't seen explicitly documented to the best of my knowledge. One of those is dealing with object ownership and the lack of actual superusers.In a "normal" PostgreSQL cluster, there are no checks on a s...