output "db_instance_identifiers" {
  description = "Map of RDS instance identifiers keyed by instance name"
  value       = { for k, v in module.rds : k => v.db_instance_identifier }
}

output "db_instance_master_user_secret_arns" {
  description = "Map of RDS master user secret ARNs keyed by instance name"
  value       = { for k, v in module.rds : k => v.db_instance_master_user_secret_arn }
}