I'm having an issue with querying user profile action. I pass the username (domain\user) to the action to retrieve some values from profile. however, it gives me this error message although I'm passing the username in the same requested format. 

I tried with using Person or group field but same message appear.

Error querying user profile. Invalid Windows credentials supplied. Credentials should be in a domain\username format.

Can someone please help  on how to fix this error?