Fix picking when to use Oauth

src/cal_tools/calcat_interface2.py

@@ -23,7 +23,7 @@ def get_client():
 def setup_client(base_url, client_id, client_secret, user_email, **kwargs):
     global global_client
     global_client = CalibrationClient(
-        use_oauth2=(client_id is None),
+        use_oauth2=(client_id is not None),
         client_id=client_id,
         client_secret=client_secret,
         user_email=user_email,