as an invited user, I can validate and edit my newly created account

When I receive the email with the validation link or click to edit my profile, I can:
set/change my password
verify my password

change my First or Last name.

All of these fields are required

https://projects.invisionapp.com/d/main#/console/12114617/293525517/preview

for now, users can only change very basic info. Later, we will work on applying a personal avatar image.