title: django user login view
body: <p>I want to place a "login" field in every page. I looked some examples about authentication in django and all of them creates a new login page and uses django.contrib.auth.views.login . 
  However, I want to use some parts of this view. So how can i create a view that uses also django auth ? </p>
  
  <p>p.s.: if it's not clear let me know, cause I'm kinda lost and don't know how to ask =)</p>