I am Teruhiro Komaki of frudens Inc.
Although it may be a bit hard to understand from the title, it is implemented so that you can replace the consent screen with any application, not fmOAuth(default).
That way, you can login to the console with your Google account, have the application created, and pass the arguments.
How to write your own app, write another article.
Consent screen of fmOAuth
The default agreement screen is as follows.
Consent screen of arbitrary application
When creating an application on the console (GCP) and passing the information of the application as a script argument, the following agreement screen will be displayed.