masterUserAuthenticationType

Specifies the authentication type for the master user. With IAM master user authentication, you can configure the master DB user with IAM database authentication when you create a DB instance.

You can specify one of the following values:

• password - Use standard database authentication with a password.

• iam-db-auth - Use IAM database authentication for the master user.

This option is only valid for RDS for PostgreSQL and Aurora PostgreSQL engines.