In the Settings module under the Account feature, you'll find the Team Member tab that allows you to view a list of Team Members and their allocated roles.
You must have Administrator access to to create, edit and remove team members.
Adding a new team member
Click the green button titled 'New Team Member' on the top right hand corner of your screen.
A new form will display where you can enter Details about the new Team Member including First Name, Last Name, Email and Role (explained here).
After entering all the details, press the green button, Create Team Member - you will be returned to the List of Team Members.
The new Team Member will now be viewable on the list of Team Members and will receive an email with instructions on how to access their account.