title: where to add "social_core.backends.yammer.YammerOAuth2" for social authentication in django
body: <p>Hey guys I am new to django , I am learning to build some application using it , so  I am following some example instructions of some blog. In that there is need of configuring an <code>social authentication django</code> package with my app.
  I am not getting where to add this line please point out.</p>
  <blockquote>
  <p>Add social_django to INSTALLED_APPS Add</p>
  <p>social_core.backends.yammer.YammerOAuth2 to AUTHENTICATION_BACKENDS</p>
  <p>Set LOGIN_REDIRECT_URL = ‘/badges/’ Set LOGIN_URL = ‘/login/yammer’</p>
  </blockquote>