Can't figure out Google Authentication 2.0 without a pop-up confirmation window?

Question

Google

Guys, I need to implement google authentication 2.0 without confirmation window (screen1). Authentication principle 2.0 - I get the authentication code in the URL after clicking in the box - ALLOW. Then I change it to a token and the whole thing is in the bag. But how do I get this authentication code without pop-up window and pressing the ALLOW button.

Answer 1

I'm afraid that Google needs confirmation and it is on its side.