YOUR_CLIENT_SECRET_FILE.json

{"installed":{"client_id":"your-client-id","project_id":"your-project-id","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://oauth2.googleapis.com/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_secret":"your-client-secret","redirect_uris":["urn:ietf:wg:oauth:2.0:oob","http://localhost"]}}