Building a custom authentication backend

Module04/bookmarks/account/authentication.py

@@ -0,0 +1,17 @@
+from django.contrib.auth.models import User
+
+class EmailAuthBackend():
+    def authenticate(self, request, username=None, password=None):
+        try:
+            user = User.objects.get(email=username)
+            if user.check_password(password):
+                return user
+            return None
+        except (User.DoesNotExist, User.MultipleObjectsReturned):
+            return None
+
+    def get_user(self, user_id):
+        try:
+            return User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            return None

Module04/bookmarks/bookmarks/settings.py

@@ -131,4 +131,10 @@
 EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
 
 MEDIA_URL = 'media/'
-MEDIA_ROOT = BASE_DIR / 'media'
+MEDIA_ROOT = BASE_DIR / 'media'
+
+
+AUTHENTICATION_BACKENDS = [
+    'django.contrib.auth.backends.ModelBackend',
+    'account.authentication.EmailAuthBackend',
+]