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..."}