masterUserSecret

The secret managed by RDS in AWS Secrets Manager for the master user password. When you restore a DB cluster from a snapshot, Amazon RDS generates a new secret instead of reusing the secret specified in the `SecretArn` property. This ensures that the restored DB cluster is securely managed with a dedicated secret. To maintain consistent integration with your application, you might need to update resource configurations to reference the newly created secret. For more information, see Password management with Secrets Manager in the Amazon RDS User Guide and Password management with Secrets Manager in the Amazon Aurora User Guide.