You can update your password, by clicking on your avatar in the top right corner. Select the 'Account' button from the dropdown menu. Next, select Login & Security' from the left hand menu and then select 'Change Password'.
You can create your account by following the steps below. Navigating to the Login page here. Next, clicking on the ‘Register an account’ button. Enter your email and create a password, then click 'Register account'. Click 'Setup your account', then ...