Describes Amazon RDS instances.
See https://www.paws-r-sdk.com/docs/opsworks_describe_rds_db_instances/ for full documentation.
opsworks_describe_rds_db_instances(StackId, RdsDbInstanceArns = NULL)
[required] The ID of the stack with which the instances are registered. The operation returns descriptions of all registered Amazon RDS instances.
An array containing the ARNs of the instances to be described.