Retool db schema support

I'm attempting to provision self hosted Retool on AWS with an external RDS database. I've created the five environment variables to provide credentials and connection info, and I intend Retool to use a database I've created on the instance like retool and a schema within that db, also called retool. When the ECS service starts and migration is attempted, it fails with:

Error running database migrations: MigrationError: Migration 20170801051119-add-ssl-column-to-resources.js (up) failed: Original error: relation "public.resources" does not exist

The table resources does exist in the schema I'd like retool to use, but not in public, which I don't want to be used.

How can I ensure Retool uses the schema? The created db user is also named retool.