Setting id field as arbitrary unique column

[theo-m]

Hi there,
Thanks for the work on this, super cool!

I was wondering if there existed a way to declare a certain column in my table as the target for identification. This echoes this issue: #1058 but might be a bit different in that I'm not looking for a new fancy scalar.

My use case is rather similar though: I don't want to expose my serial incremental ids over graphql and would prefer if all the graphql exchanges passed around uuids.

Best,
Théo