Minor typo fix

docs/api-guide/authentication.md

@@ -203,7 +203,7 @@ You can do so by inserting a `needed_by` attribute in your user migration:
 
 For more details, see the [south documentation on dependencies][south-dependencies].
 
-Also not that if you're using a `post_save` signal to create tokens, then the first time you create the database tables, you'll need to ensure any migrations are run prior to creating any superusers.  For example:
+Also note that if you're using a `post_save` signal to create tokens, then the first time you create the database tables, you'll need to ensure any migrations are run prior to creating any superusers.  For example:
 
     python manage.py syncdb --noinput  # Won't create a superuser just yet, due to `--noinput`.
     python manage.py migrate