diff --git a/flashcards/api.py b/flashcards/api.py
index 0dd092d..f7b3a04 100644
--- a/flashcards/api.py
+++ b/flashcards/api.py
@@ -84,7 +84,7 @@ class UserLogin(APIView):
         password = request.data['password']
         user = authenticate(email=email, password=password)
 
-        if user is not None:
+        if user is None:
             raise ValidationError('Invalid email or password')
         if not user.is_active:
             raise ValidationError('Account is disabled')