You can only invite new users, if you are an owner in your organization. Do you want to learn more about user roles and permissions? Read Getting to know ZENSIE.
To invite new users to your organization:
1. Click at the Account Settings link, at the side bar menu.
2. At the Users tab, click on the green plus (+) button to invite a new user.
3. Fill in the details of the new user and click INVITE.