Hello! First of all our team is loving Growthbook, thank you. I have an experiment where I split users by their id. What happens if for some reason I fail to provide id as an attribute to Growthboo?. In my tests I'm seeing that the user isn't assigned to any variation, wanted to confirm this.

Hello. Yes, that's correct. If the id is missing the user is excluded from the experiment.

Thanks for the confirmation.