No credits given upon new user registration

I watched the demo[ here](https://www.youtube.com/watch?v=hEHBcPsskZs) and wanted to give this a try. In the demo, when a new user registers, credits are given so you can test run the brand monitor engine. However, when I register a new user, this new user does show up in my autumn and stripe dashboards, but no product is attached to this user, though default product is set and there are features under it. When I register a new user, I do see this error:
`ERROR [Autumn] Create stripe subscription failed (parameter_missing): Missing required param: items.`

When I manually attach a product to a user, whether the free or paid tiers, I don't see any credits being provisioned. I am wondering are we supposed to be able to repeat what's shown in the demo out of the box, or should we not expect to receive any credits to test out the full functionality of the app? Thank you.

Reproduce a new-user registration and inspect the Autumn and Stripe dashboards alongside the reported "Missing required param: items" error. Compare the result with the linked demo and verify whether a default product and its credits are attached after registration; done means the documented out-of-the-box flow provisions credits without manual product attachment.

Written by the indexing model from the issue text.