example.credentials.json

{
    "installed": {
        "client_id": "123456-jasdh98897123hjajbd891jhah.apps.googleusercontent.com",
        "project_id": "tangara-email-notifications",
        "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": "A0BCD-D-HkoRexWL_P-c8KL85WjO1uEkP9",
        "redirect_uris": ["http://localhost"]
    }
}