google oAuth2 limit list of domains

Hi all,

I was using Google OpenID auth till they start to announce deprecation in a few months - so I understand that I've to move to oAuth2.

I've configured it - and it works great!

But... I'm missing a very important feature - the ability to give a list of allowed google apps domains that are able to authenticate..

I know that I could prevent account creation when authenticating - but then I've to create all accounts...

Is there any known way to limits domains on oAuth2 ? or I've to write something in the auth plugin ?

tnx,

--Yedidia Klein