Oauth 2.0 restrict users within organization

Question

I had the issue to restrict users within the organization using Oauth 2.0 API.

Answer 1

I resolved it by selecting application type to internal.

Now, if the users will try to authenticate the user from the email other than organization email. He will get an error message: This client is restricted to users within organization

Notes: The Google developer account should be of the same organization, to which you want to restrict the user oauth

For detail steps you can see the following attached screenshot.

Adding Intenal domain setting screenshot

Google message will be shown to other users screenshot