To add additional users (sub-users) to a company account, perform the following:
1. Login to the customer account using the B2B login page
2. Go to Account -> Manage Users
3. Enter the new user's name and email address
4. Select the permission level the new user will have:
- Administrator - full admin access, can manage company users and complete orders
- Requester - limited access, only able to send orders for approval to company administrators
