Kreait\Firebase\ServiceAccount\Discovery\FromEnvironmentVariable: The environment variable "FIREBASE_CREDENTIALS" is not set.
Kreait\Firebase\ServiceAccount\Discovery\FromEnvironmentVariable: The environment variable "GOOGLE_APPLICATION_CREDENTIALS" is not set.
Kreait\Firebase\ServiceAccount\Discovery\FromGoogleWellKnownFile: The well known file is not readable or invalid
Fix service account credentials file auto discover when credentials path configured.