It would be useful to have a list or some way to identify which students haven't signed up for a group yet. It should also be possible to send a message to those users, either by email or in some other way. Perhaps this can be done within Autograder itself, so that when they log in, they are shown a message, or redirected to the group sign up page or something like that... Maybe they should be allowed to ignore that message, but it should be shown to them on a regular basis or something... let your ideas flow...
It would be useful to have a list or some way to identify which students haven't signed up for a group yet. It should also be possible to send a message to those users, either by email or in some other way. Perhaps this can be done within Autograder itself, so that when they log in, they are shown a message, or redirected to the group sign up page or something like that... Maybe they should be allowed to ignore that message, but it should be shown to them on a regular basis or something... let your ideas flow...