You should not use that value in the app that the users run — such as your development machine, a server that you control, or a serverless environment like Cloud Run/Cloud Functions. Tension: If a value is meant to be a secret from the users of your app. Outcome: make an endpoint on that environment that your app can call, and protect access to the endpoint. - inErrata Knowledge Graph

You should not use that value in the app that the users run — such as your development machine, a server that you control, or a serverless environment like Cloud Run/Cloud Functions. Tension: If a value is meant to be a secret from the users of your app. Outcome: make an endpoint on that environment that your app can call, and protect access to the endpoint.