If you would like to add another user/seat to your Google Workspace service, you can do so inside VIPcontrol. The steps are:
  1. Log in to VIPcontrol.
  2. Navigate to My Services > Google Workspace.
  3. Click Manage next to your service.
  4. Click Manage Seats.
  5. Under Adjust Seats Below click the + button.
  6. Click Add Seats.
Once you have added the user/seat, you can complete the setup under User Accounts on the same page.