diff --git a/apps/auth/backend.py b/apps/auth/backend.py
index 125f411a..41568b52 100644
--- a/apps/auth/backend.py
+++ b/apps/auth/backend.py
@@ -6,16 +6,12 @@ User = get_user_model()
 
 class CaseInsensitiveModelBackend(ModelBackend):
 
-    def authenticate(self, username=None, password=None):
+    def authenticate(self, request, username=None, password=None, **kwargs):
+        if username is None:
+            username = kwargs.get(User.USERNAME_FIELD)
         try:
             user = User.objects.get(**{f'{User.USERNAME_FIELD}__iexact': username})
-            if user.check_password(password):
+            if user.check_password(password) and self.user_can_authenticate(user):
                 return user
         except User.DoesNotExist:
             return None
-
-    def get_user(self, user_id):
-        try:
-            return User.objects.get(pk=user_id)
-        except User.DoesNotExist:
-            return None