Question: Deployment to multiple different firebase projects in CI

[pascalbe-dev]

Hey, first of all: great plugin. The re-write was great. Now it's really nice to use. 🥳

I got a question:

How I can run the deployment of different apps (via. affected) in CI and configuring the credentials for that?

Thoughts (brain dump when thinking about the topic):

• The different apps need different credentials, so I need to somehow configure for an app (project.json) which credential to use.
• It must also work with different environments for one app (e.g. stage and prod)
• It should work with the GOOGLE_APPLICATION_CREDENTIALS environment variable, because that is the not-deprecated way to run authorize a deployment
• We need to be able to provide different credentials in our CI tool. These are usually provided via environment variables
• When I run an affected deployment, all deployments should work even to different firebase projects

I played around with it a bit, but have no nice solution yet. Maybe you have some ideas?