Whenever you’re adding a user to your account, you have to select a profile which accounts for a set of access rights:
• Administrator/Super User: it’s basically an all-access profile that allows you to see every menu, every case, client, contact and all users information
• Power User: it grants access to all of the menus except Users Information
• Other Users: it grants access as specified by the Administrator.
NB: The administrator/superuser has a maximum number of just a user.