title: CAC (Common Access Card) reader in js
body: <p>So I am tasked with having a user either sign in with a username/password combination or they can sign on with their CAC card. I know that I will need to use a card reader to do so but I am completely lost on what to do. I have not been able to find a way to use a card reader from the browser for a CAC card sign in. </p>
  
  <p>What response will I get from scanning a CAC card? Will I be able to at least get an ID from it to associate it with a user account? </p>