WIP: Good Grid OAuth 2.0 backend

DO NOT MERGE!!!

This will ultimately live in LMS or a separate package.

course_discovery/apps/core/backends.py

+from social_core.backends.oauth import BaseOAuth2
+
+
+
+class GoodGridOAuth2(BaseOAuth2):
+    name = 'goodgrid'
+    AUTHORIZATION_URL = 'https://findgood.goodgrid.com/AuthorizationServer/OAuth/Authorize'
+    DEFAULT_SCOPE = ['personal']
+    # TODO Work with Good Grid to support the code response type.
+    RESPONSE_TYPE = 'token'
+    REDIRECT_STATE = False
+    STATE_PARAMETER = False

course_discovery/settings/base.py

@@ -231,6 +231,7 @@ AUTHENTICATION_BACKENDS = (
     'auth_backends.backends.EdXOpenIdConnect',
     'django.contrib.auth.backends.ModelBackend',
     'guardian.backends.ObjectPermissionBackend',
+    'course_discovery.apps.core.backends.GoodGridOAuth2',
 )
 
 # Guardian settings

course_discovery/settings/devstack.py

@@ -33,6 +33,8 @@ PARLER_LANGUAGES = {
      }
  }
 
+SOCIAL_AUTH_GOODGRID_KEY = 'XXXX'
+
 #####################################################################
 # Lastly, see if the developer has any local overrides.
 if os.path.isfile(join(dirname(abspath(__file__)), 'private.py')):