url(r'social-auth/', include('social_django.urls', namespace='social')),

{% for name in social_auth.backends.oauth %}
      <li><a rel="nofollow" href="{% url "socialauth_begin" %}">{{ name|title }}</a></li>
   {% endfor %}

AUTHENTICATION_BACKENDS = (
 'social_core.backends.open_id.OpenIdAuth',  # for Google authentication
 'social_core.backends.google.GoogleOpenId',  # for Google authentication
 'social_core.backends.google.GoogleOAuth2',  # for Google authentication
 'django.contrib.auth.backends.ModelBackend',
)