Why is the _id a uuid

[singersbalm]

Discussed in #148

^{Originally posted by singersbalm March 19, 2024}
Why can't I define a custom _id?. I tried to define a users collection with the email as _id to improve lookup performance.

func isValidObjectId(id string) bool {
	_, err := uuid.FromString(id)
	return err == nil
}

Clover only allows uuids, but why. what's the benefit? Shouldn't that check be optional?