"The provided credentials could not be determined"

***self-hosted organization**

We have a third party vendor accessing data by making calls via the API. He keeps getting the error "The provided credentials could not be determined." I have already verified that the credentials he is using are correct (username:groupid:machine). I also checked to see if the user account was locked or requiring a password change.

Anyone familiar with this? Any ideas?

Ashley Elliott

Database Administrator

St. Louis Symphony Orchestra

314-286-4198

ashleye@slso.org