Refresh datacenter is not working for auto mid selectionDescriptionAuto mid selection is not working for cloud discovery from CDW. Engineering details: When mid selection type is auto select mid, 'null' is passed from CDW UI to the backend rest API instead of null object, which is creating an issue.Steps to Reproduce 1. Go to cloud discovery workspace.2. Open cloud discovery.3. Create new discovery schedule.4. Give discovery schedule name.5. Select cloud provider.6. Then select auto select mid server.7. Then select service account and click next.Expected: It should bring all the datacenters for selected service accounts.Actual: discovery status is not getting completed.WorkaroundApply the update set attached to this PRB. Changes in update set: 1. When calling Databroker from a client script, passing a null object instead of the 'null' string.Related Problem: PRB1934106