For adding read replica database instances, the operation is INSERT and value object to specify is
#/definitions/CreateDbInstanceDetails.
For removing read replica database instances, the operation is REMOVE and value object needs to be an array of dbInstanceId's.
For adding read replica database instances, the operation is INSERT and value object to specify is #/definitions/CreateDbInstanceDetails. For removing read replica database instances, the operation is REMOVE and value object needs to be an array of dbInstanceId's.