If you need to update your user password, simply navigate to your user settings once you have logged in to Pattyrn by clicking the 3 bar icon on the left side nav bar (or bottom if you are on a mobile device).
When you have arrived at your settings page, click the "security" link in the left sidebar. When the page appears you can now add a new password to use for your account. Once you have done so, click the "update" button and you will receive a message on the page if the changes were successful.
If you have changed your password, you will now be required to use the new password for logging in to your account.