Once you are logged into your account, you may change your username and/or password by navigating to Administrative Forms
>> Change Username and/or Password
To make a change to either your username and/or password, you will need to uncheck
the box(es) that says "I don't want to change my....." next to the corresponding item that you want to change. This will allow the change fields to display where you can enter your new desired username and/or password.