How to get the Access Token to use with Google services

[AshD]

Is it possible for Google SignIn return the OAuth Token that can be used for accessing Google services like Classroom, Docs, Sheets API?

I had asked this question on Stackoverflow but no response.
https://stackoverflow.com/questions/62058765/firebase-idtoken-to-google-oauth2-access-token-in-unity

Thanks,
Ash

[mehmetresatdilbaz]

There is an endpoint for this in googe api.

You should post to "https://oauth2.googleapis.com/token" with parameters
{
client_id:"",
client_secret:"<that client's secret>",
code:"<auth_code from the google sign in return data>",
grant_type:"authorization_code",
redirect_uri:"",
}

then you can get the access_token from that post.