As an admin, you can control your team's credit usage by designating limits in the Team section.
Go to Team in the top panel, and select the Groups Tab.
Click the 3 dot menu and select Limit Group Usage.
Now you can limit the group's monthly or annual credit allotment using the slider, or by typing in the number. (Learn more)
You can also remove a limit by clicking the Remove Limit button.
Learn more about creating groups by clicking here.