If you've forgotten your password, head to ticketpass.org/login to reach this page:
If instead you reach your 'My tickets' page, then you're already logged in. To reset your password in the event that you've forgotten it, make sure to logout first.
Enter your registered email - if you don't have an account registered to the email you enter, you'll be prompted to enter details like first name, last name, confirm email, phone number, password, date of birth etc.
If you enter your registered email but can't remember your password, click the Forgot password button:
This will send a link to your email address that will allow you to reset your password and return to the event page where you're trying to book tickets or to your My tickets account.
If you're trying to purchase a ticket and are in a rush to get one before they run out, it may be worth creating a new account with a new email.