Your Authentication Code is chosen when initially setting up your filter.See here to find out how this code keeps your account secure. If you have forgotten your code you can reset it by logging into your account at techloq.com. Visit the 'filtering settings' tab in the ribbon at the top of your page. Select the user you wish to change the code of and then click 'user info'. Use the button 'reset authentication code' to send an email to the user's email address with a link to reset the code.