Zapier Plugin Blank Data

Hello all, I am trying to setup a Zap that will send a slack notification every time that a new user signs up to my app.

I am triggering this via sign up workflow, however when looking at the tests, the message from Zapier is not retrieving the values I want and is leaving them blank.

Input: text: {{187485779__first_name_text}} {{187485779__last_name_text}} has just signed up to Athena!

Output: has just signed up to Athena!

Not sure if this has to do with privacy rules? Not sure what I am missing here.



Any ideas?