firebase serve not using gcloud impersonated_service_account

[Thaina]

I am not sure this should be reported bug or feature request but I think firebase serve functions should allow using createCustomToken without the need for GOOGLE_APPLICATION_CREDENTIALS set

I have already try using gcloud auth application-default login with --impersonate-service-account and it seem firebase serve are not using this credential for firebase auth functions

If this is not a bug I would like to request this feature that firebase tools should automatically request for impersonated_service_account at firebase serve. It was more secure to require login with account in local development environment without the need to download private key and linked it within project folder

[joehan]

Thanks for the feature request! I'm currently looking into better ways to automatically provide emulators with application credentials as long as you are logged in, which should hopefully address this issue.