The concept of the user management is similar to that of the WebHMI: the roles allows for access to different project parts, while users are bound to that roles.

Use Level2 side bar to access user management:

In the Basics settings you set an email that will be used for the authorization. You have to complete the registration procedure by confirming registration in the message you'll get afterwards.

Details tab. Says for itself.

Settings. Here you put an e-mail address for notificatoins, like expiration of funds, broken VPN etc.