update location filter

rog/backend.py

@@ -0,0 +1,28 @@
+from django.conf import settings
+#from django.contrib.auth import get_user_model
+from .models import CustomUser
+from django.contrib.auth.backends import ModelBackend
+
+class EmailOrUsernameModelBackend(ModelBackend):
+    """
+    This is a ModelBacked that allows authentication
+    with either a username or an email address.
+    
+    """
+    def authenticate(self, username=None, password=None):
+        if '@' in username:
+            kwargs = {'email': username}
+        else:
+            kwargs = {'username': username}
+        try:
+            user = CustomUser.objects.get(**kwargs)
+            if user.check_password(password):
+                return user
+        except User.DoesNotExist:
+            return None
+
+    def get_user(self, username):
+        try:
+            return CustomUser.objects.get(pk=username)
+        except get_user_model().DoesNotExist:
+            return None