If you ever need to change your account password, then this is really easy to do and helps ensure your account remains secure.
Select the My Account menu and then Edit Sign In Details.
To change your password, first re-type your current password and then enter your new password. You will need to enter this twice to ensure it is entered correctly. Lastly, click Update to apply the change.
Please note, to ensure that your account remains secure, you password has to meet miniumum criteria to be allowed. Your new password must be: