How to generate Access Token for BigQuery in Diyotta?

Access Token will be generated through google OAuth playground. Just type Google OAuth  playground it will give us google developers link. Once we click on it, we should select scope based on our requirement as shown in below

Select any one permission and click on Authorized APIs ->sign in with google account -> Allow-> Exchange Authorization code for tokens.

It will show us json structure where we can find the access token and use this token in Bigquery datapoint.