Create workflow to verify user account

[caiyingshen]

Related to #334

When a user registers on the auth server, their account needs to be verified by putting in the pin from their email. This is not a high priority since at the moment only directors need the functionality that needs verification, but we should create a workflow that allows users to verify their own account.

Possible options:
1: create a window before the pending screen where users have to put in their pin before getting access to their account.
2: add an option in the profile page that allows them to verify their account (if/when the profile page is created)