You also need to link a Github account to EPIC games. To do so:
Create a Github account if you do not have one already
Create an Epic Games account if you do not have one already
Authenticate with the GitHub Container Registry and note your access token
Finally, this workflow relies on the Unreal Renderer Microservice which is currently only available as Early Access. If you do not have access to this resource yet, reach out to your NVIDIA Account Manager.