If you forget your password, you can click "Reset Password" at the login page and you will receive an e-mail named "Reset Password" . You need to press the link and it will lead you to a reset password page.
You can enter a new password in 'New password' and 'Confirm password', when you finished, press 'Reset Password'. Then your password will be changed.
Please note that the password must contain at least 8 characters, one number, and at least one capital letter.