Purchases a reserved DB instance offering.
See https://paws-r.github.io/docs/rds/purchase_reserved_db_instances_offering.html for full documentation.
rds_purchase_reserved_db_instances_offering(
ReservedDBInstancesOfferingId,
ReservedDBInstanceId = NULL,
DBInstanceCount = NULL,
Tags = NULL
)[required] The ID of the Reserved DB instance offering to purchase.
Example: 438012d3-4052-4cc7-b2e3-8d3372e0e706
Customer-specified identifier to track this reservation.
Example: myreservationID
The number of instances to reserve.
Default: 1