If you have purchased additional users for your subscription, you can add the new users to your reciProfity account by clicking the gear icon, clicking on "Manage Users", then select "Users".
On the following screen, click the green "New User" button
Finally, enter the user's e-mail address and, if applicable, assign them to a group (click here for more information on creating user groups). Then click "send an invitation". The new user will set up their password when they receive the invitation.