Okay thanks!
This takes into account the users who are ‘new’ and don’t already have an account, but what about those who already have an account but were not logged in when they used the invitation link. It would be confusing to see a long form that they are ‘requested’ to fill in ‘and create a new account’ when they already have one (without a clear indication that if they already have an account, all they need to do, is to login.)