Credits can be seen in the credit overview, so that the user gets an overview of so far used and charged credits. The overview is displayed in the Licenses Overview (Settings/Licenses/Overview).
The displayed bars provide information about the current use of the available resources. The green colouring shows a low usage and the red colouring a high usage. The number before the "/" indicates how many resources have already been used. The second number indicates the total number of available credits.