I'm trying to populate a variable for user input from business objects, is it possible? If not, I'm also trying to programatically populate the list and I can't seem to be able to.
This is the look of my business objects:

The list is AvaialableUsers, it's always populated.
In the variable configuration, I tried many things, but the most logic one I tried is this:

And the result in the report is this, empty list:

Please help!