To invite a user to the master account:
1. Login to the account.
2. Click on your profile at the left hand panel.
3. Select “Account” from the Profile menu.
4. Got ot the Team tab.
5. Click “Add Team Member”.
6. Enter the email address of the team member who you want to invite.
7. Select the user role: user, reader, or admin.
8. Send the invitation email to the team member.
The user will need to click the link in the invitation email and set up their password for the master account.