I want to export a list of projects with their associated project users

I want to export a list of project data using Fusion. I have most of the fields configured, but I cannot figure out a way to export a list of users associated with each project (the project team). 

I see an expression in reports that refers to projectUsers. But I don’t see anything like that as an option in Fusion as a project field. Here’s what I have in text mode for the report:

displayname=Project Team Members

listdelimiter=

listmethod=nested(projectUsers).lists

namekey=group.plural

textmode=true

type=iterate

valuefield=user:name

valueformat=HTML

I want what that produces on that report to be part of my export from Fusion, but I can’t figure out how to get there.

I tried to use Related Records. I tried to do a search for users but can’t figure out a way to search for “users associated with this project” …