I found that in the google-services.json file for Moodle mobile app, there are two "current_key" in "api_key" section, but in the google-services.json file which I have downloaded from Firebase console, there is one.
Should I add another key to this file?
In Firebase console, in the project setting page & general tab, there is a "Web API Key". Also in Clound messaging tab, there is a "Legacy server key". Both are different from the api_key in google-services.json file.