SPD2013: I need to get the checkoutusr of files checked out in my document library in my Workflow

Question

I am using the Call HTTP Web Service inside of 2013 designer. I can get my query to work, but once I try to add the person columns is where I fail. It no longer runs.

I have tried so many things. the column name is CheckoutUser in my library and my select in my request is below:

select=ID,Title,CheckoutUser/Name&$expand=CheckoutUser

Answer 1

I added the answer above, aka Well it's working. exactly as coded above. Selecting it into a variable simply uses d/results([Variable:Index%]/CheckoutUser/Name

Not certain what was going on.