tests/data/client_secrets.json

{
  "web": {
    "client_id": "foo_client_id",
    "client_secret": "foo_client_secret",
    "redirect_uris": [],
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://accounts.google.com/o/oauth2/token",
    "revoke_uri": "https://accounts.google.com/o/oauth2/revoke"
  }
}