Going back to my first example:
Try blocks like this:
Note that the usernames come back with an extra set of double quotes....
If you have sublists inside each User (name/age etc.) then you will need to iterate over each of the lists.
Alternatively you could save a separate node full of just users names to test against.
Learn about using lists:
- Lists by Sajal Dutta
- Lists appinventor.org