The maps API key for your eDirectory site is meant to be public.

  1. Log in to the Google Cloud Console and review the API and billing activity on your account, ensuring the usage is in line with what you expected.
  2. Add API key restrictions to your API key.

Authenticate using API keys  |  Authentication  |  Google Cloud

Restrict your "eDirectory project" API key to only be used by that project (following the steps on the link above).

Note: you may need to generate another key for your maps to be used exclusively by

For further info on Google Maps on eDirectory:

How to activate Google Maps : eDirectory - Support Center

Note: step #3 instructs on how to restrict the API key