Forgetting your password is the worst! But it's pretty simple to get a new one.
From the sign in page, select “Need help signing in?”. This is going to send you an email to your nominated email address. In this email will be a link that is going to redirect you to a page to recreate a new password.
Sometimes your email settings can prevent the hyperlink from working. If this is happening, you will just need to copy and paste the link into your browser to continue with resetting your password.
Once your new password is created, you'll be able to log in again. . . don't forget it this time!