How do you handle a new user sign up?

[j-lee8]

I was wondering how you guys handle a new user sign up?

I know in the jwt callback there's an isNewUser parameter that is returned. I tried to do a router.push(url) here as I want there to be some additional defaults set which should go into a different table on sign up only but it yielded a browser runtime error. Is there a way to add this isNewUser field into the useSession? I don't want to store it against the user though (so doesn't need to go into the user table) so I don't think I need to extend the model.

I don't seem to get much luck on here with questions so hopefully somebody has done something similar.

Thanks all.