OpenID realm field for user authentication in packaged chrome app

Question

if I'm using Google OpenID to authenticate users for my packaged app I need to fill in OpenID realm field. The problem is that I have no clue what to enter. The documentation sais:

In the text field that appears, enter the realm that your app will use to query Google's OpenID service. This must be exactly the same as the value of the openid.realm field in your authentication requests.

What exactly should I enter? where I can see/get this value?

Answer 1

OpenID realm is mostly used when you are migrating from OpenID 2.0 protocol to OpenID Connect.

Basically if don't know what to specify there you may leave it blank, but in general this field value must correspond to openid.realm request parameter (optional) when building an authentication request to Google.

Please, read Migrating from OpenID 2.0 to OpenID Connect and OpenID Connect documents from Google Identity Platform section for more details.

P.S. please, tag you OpenID related question with google-oauth label to get the response quickly ;)