If you are unable to access your Moodle account and require a new password, you can request one by typing out your email address and selecting the 'Forgot Password?' option above the login button (see image 1. below).
Once you press this, you will be alerted to a notification that a password reset link has been sent to your email address. You can access the Moodle log-in page here.
Should this option not appear for you (if you have a manual login with a username, for instance), you are welcome to email the Student Services Team who will be able to organise a password reset link to be sent directly to your email address that your Moodle is registered with.