Integração API Google Calendar

I’m trying to integrate with Google Calendar, but whenever I try to log in to enable the API, I receive the following message:

API Connector error: the Oauth2 API Google Calendar is not configured properly - Received error from API The service Google Calendar just returned an error (HTTP 401). Please consult their documentation to ensure your call is set up properly. Raw error:

{
“error”: {
“code”: 401,
“message”: “Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.”,
“status”: “UNAUTHENTICATED”
}
}

What could I be doing wrong?

I never like bubble own Oauth2, its weird, if you like i will build the call for you manually for free, book a call on my profile .