Pass result of scenario 1 to scenario 2 as a feed

Gatling (Open-Source)
1

I want to perform load testing 10,000 unique users for n number of time.
Before that i wan to execute call for Auth toke once for all 10,000 unique users.

I have implemented dynamic simulation where scenario 1 resutl is passed as feed to other scenario, but as both scenario are concurrently executed, feed to 2nd sceanrio is empty.

Bellow is my code in setup.

setUp(
  scnList: _*

).protocols(httpProtocol)