These are the steps on how you can add new team members to your account.
1. Go/Login to your account
2. Click on the People tab on your left panel
3. Click Invite a new team member
4. Add the email of the person you want to add
5. Select the role for the person/email you added.
From there a confirmation email will be sent to the person you added.
Note: Please check spam as well if you can't find the confirmation.