Ahh right, in development `User` and `AuthUser` will have the same ID,
but that got messed up early on for us in production DTI 😅
Here, we switch the form to reference the `User` instead of the
`AuthUser` (to get the ID right), then we also change how we compare
the IDs, because `User#to_param` appends extra text onto the ID after
the number!
