lil-600, case insensitive auth backend

apps/auth/backend.py

@@ -0,0 +1,21 @@
+from django.contrib.auth.backends import ModelBackend
+from django.contrib.auth import get_user_model
+
+User = get_user_model()
+
+
+class CaseInsensitiveModelBackend(ModelBackend):
+
+    def authenticate(self, username=None, password=None):
+        try:
+            user = User.objects.get(**{f'{User.USERNAME_FIELD}__iexact': username})
+            if user.check_password(password):
+                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

project/settings.py

@@ -142,6 +142,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 AUTH_USER_MODEL = 'user.User'
 
+AUTHENTICATION_BACKENDS = ['apps.auth.backend.CaseInsensitiveModelBackend']
 
 # Internationalization
 # https://docs.djangoproject.com/en/2.0/topics/i18n/