Hi Lucie,
You are right. Only users who have signed in can use the ChatGPT blocks. That’s partly because we need to monitor any users who abuse this feature and take action.
Any user can easily sign up for free with a valid email address, or they can log in directly using Google login.
You can also create a class with new student accounts for free, and then assign them to your students: https://www.forum.creaticode.com/topic/547/teacher-only-how-to-manage-students-in-the-my-class-page
CreatiCode