title: User current authentication status check endpoint with django and django rest framework
body: <p>How could I create an endpoint in <code>django-rest-framework</code> that would facilitate checking whether a given user was currently logged in? </p>
  
  <p>The idea would be to supply the authentication token and user name, then get a response like <code>{"Authenticated": True}</code> or <code>{"Authenticated": False"}</code>.</p>