title: Configure Postgres application users with Terraform for RDS
body: <p><a href="https://www.terraform.io/docs/providers/aws/r/db_instance.html" rel="noreferrer">Terraform allows you</a> to define Postgres master user and password with the options <code>username</code> and <code>password</code>. But there is no option to set up an application postgres user, how would you do that?</p>