title: PassportJS adding another property to req.user
body: <p>How would I add a variable to the request.user property?</p>
  
  <p>Most of my routes involve checking for the authenticated user via "req.userusername".</p>
  
  <p>How could I add another field for location. I ask this because I want to add a location field. to the req.user object.</p>