This depends on the type of account creation you did.
Tyto Managed Accounts
Student accounts are NOT required to have emails for privacy reasons, so the only way for an account without an email to get its password reset is for the teacher to do it for them.
Go to "Class Rosters" in your Learning Dashboard and select the class the student is in.
From there, you'll see an option to "Edit Roster."
You can then simply type in a new password for the student, and select "Save" at the bottom of the page. The change will take effect immediately.
If the student has an email associated, such as if they entered one when self-registering with a class code, then they can reset the password themselves.
Use this link for resetting a password. Or just click "unable to login?" when trying to log in on account.tytoonline.com and follow the prompts!
Google Classroom Accounts
If you used Google Classroom to import your students, they are therefore Google managed accounts and we do not have access to their password management. You will need to reset your password through Google Classroom.