Add default grant for iam users

[MDSLKTR]

TL;DR

Currently when adding iam users (using "roles/cloudsql.client", "roles/cloudsql.instanceUser" service accounts). They wont have any roles granted on postgres database level. Is there way to achieve a permission grant on postgres level with the creation of the iam user.

iam_users = [{
    id    = module.service-account-dev["cdm-corporate-structure"].name
    email = module.service-account-dev["cdm-corporate-structure"].email
  }]

Terraform Resources

https://github.com/terraform-google-modules/terraform-google-sql-db/tree/master/modules/postgresql

Detailed design

Is there a way to assign specific database grants when the iam user is created?

Additional information

No response