How to log in to "Play Games" using e-mail and password?

Question

Android

Hello.
There is a certain game on Android that uses authorization in "Play Games" and then transfers the received token to the game server for further work with the server. It is necessary to emulate authorization knowing the user's e-mail and password. Those. you need to get a token from Google knowing all the necessary information about the user and the application: e-mail, password, Google Play App ID, Client ID of the application, etc.
I try to google how to do it, but all the time I find absolutely wrong. Google constantly provides links to their documentation, which describes how to do this through OAuth2. And you need to do it on the server side without any user intervention. Can someone send me a link to the relevant documentation or show an example? The PL is not important, even though it's just a description of HTTP requests.
Thanks in advance.