How do I authorise an app (web or installed) without user intervention?

NB June 2022. It seems that Google have updated their verification requirements which adds additional steps (or negates the approach – depending on your point of view). See recent comments for more detail This can be done with the Oauth2 Playground at https://developers.google.com/oauthplayground Steps:- Create the Google Account (eg. my.drive.app@gmail.com) – Or skip this step … Read more