Sign In Without Google Account

Hi. I am teaching a programming class to a group of students and the App Inventor Platform requires them to log in with a Gmail account. I can't make them use their personal accounts because they are minors, and also, some of them don't have a Gmail account and I cannot make them create one...
Is there any possibility for them to access without registering with Google?
With we have been able to work thanks to the access card system. Isn't it possible with App Inventor?

You may use, you just need to remember the revisit code.