Follow these steps to add sub-users to your control panel account.
Step 1: Login to the game control panel.
Step 2: On the left hand side under "user management" click "create a sub user"
Step 3: Enter a Username and Password
Step 4: Click on the Profile tab and fill in the Email address (You can fill the other fields if you want)
Step 5: Click on "Game/Voice Service Permissions" and give the sub user the relevant permissions to the relevant service.
Step 6: Click save