How to obtain sheet "created by" in Bridge for a child workflow

Cory_OWA

How can I use Bridge API Call OR Get Sheet OR another element to obtain the "Created By" metadata for use in a workflow?

I see createdBy in the sheets summary in the SDK:
sheetSummary - fields

But I don't see it in the output of past runs of either the API Call or the Get Sheet element in Bridge. I see createdDate but not createdBy.