HI, we're migrating from username sign in, to okta that uses email as user id. we have an existing user info data with user id as username (xfsgsbss) but we would have a new data with user id as email(fdhsvbsjsbsjsh@email.com). I want to be able to join both old and new data and make sure the right attributes goes to them, but also create a dedup user (or unique user) so same user attributes with username will not be inflated by the same user attributes with email, basically not overcounting.
Any ideas or tips would help. Thank you