firebase-auth-cli

Authenticate with Firebase via CLI and output JSON of token and refresh token.

echo -e "USERNAME\nPASSWORD" | node index.js

outputs

{"token": "eyJhbGciOiJSUzI1NiIsImtpZCI6I...", "refreshToken": "AOvuKvSALI7CHVYSyYCsQ4X7kiGxiiaXuDt1QC67EZ9NlE4q..."}