Can't read Web Messaging attributes in Architect Inbound Message flow

Architect & Flows
1

The participant attributes I set via the Web Messaging SDK aren’t showing up in the Architect flow. I’m trying to grab the userId to route based on history, but the Data Action returns null.

Here is the snippet I’m using:

{
 "name": "GetAttrs",
 "actionType": "getParticipant",
 "params": {
 "key": "userId"
 }
}
  • Genesys Cloud US1
  • Web Messaging v2 SDK
  • Inbound Message flow

I’ve verified the attribute exists in the conversation log. It just doesn’t populate in the flow. What am I missing?