Add discussion api

openedx/core/djangoapps/user_api/accounts/permissions.py

@@ -6,8 +6,6 @@ from __future__ import unicode_literals
 from django.conf import settings
 from rest_framework import permissions
 
-USERNAME_REPLACEMENT_GROUP = "username_replacement_admin"
-
 class CanDeactivateUser(permissions.BasePermission):
     """
     Grants access to AccountDeactivationView if the requesting user is a superuser

openedx/core/djangoapps/user_api/accounts/views.py

@@ -1014,6 +1014,9 @@ class UsernameReplacementView(APIView):
 
     API will recieve a list of current usernames and their requested new
     username. If their new username is taken, it will randomly assign a new username.
+
+    This API will be called first, before calling the APIs in other services as this
+    one handles the checks on the usernames provided.
     """
     authentication_classes = (JwtAuthentication, )
     permission_classes = (permissions.IsAuthenticated, CanReplaceUsername)