Is there a limit to the number of users who can be in a single sandbox at a time?

Our graph team is planning on teaching a course to some of our younger practitioners and would like to use Neo4j's Sandbox. However, since there will be between 30-50 attendees, we're concerned not everyone will be able to get into the same sandbox environment.

Is there a limit to the number of people who can connect to the same Sandbox project at once?