I've created an app that uses a map to view sites. It currently uses the Opensource map, but I want to use Google Maps. I know I have to include API keys and I have all the information and ability to do it, but obviously I cannot edit the code directly, and I wouldn't want the API keys to be visible. How can I do it in a secure way? Is there a way to ensure it's stored in dedicated secrets area? What do you recommend?