Workflow | Get Metadata from Approver Who Signed off

Here's my situation:

  1. In my workflow, I have the trigger set to: "Trigger the state transition once all separate assignments are completed or approved."
  2. This produces an approve/reject checkboxes in the Assignment metadata card.
  3. When the approver checks the box (to approve) the workflow transitions to the next state.

What happens and what I need.

  1. The document is now 'Last Modified By' the M-Files Server.
  2. There is no placeholder value for the person who signed off.
  3. The placeholder value 'The user who moved the object..." applies to 'M-Files Server' and not the actual user who signed off.

Question:

How do I get or produce the placeholder value for the user who signed off (approved/rejected) the assignment?

I will need to put this in the notification such that:  User "x" approved the document.

Please advise.