If you have an existing Atomi membership and a school invites you to join their school account you'll need to accept that invite before your next login.
This email invite will have been sent to the email address that you normally log in with. If you can't find it, try the following steps:
Search your inbox for 'Atomi'.
Make sure to check your junk/spam folders.
If you're still out of luck just reach out to your teacher and they'll be able to resend your invite email. (If you're a teacher yourself, you'll need to contact the person at your school responsible for your Atomi school account.)
If you're still stuck, don't hesitate to say hi to our friendly support team, we're here to help.