API User for CO 401 Unauthorized

API User for CO receives a 401 Unauthorized despite using correct credential.

See attachment of screen shot showing the generated API key (since changed).

Here is the result of trying to use it:

$ curl -I --user 'KAGRA-LIGO.cilogon:wgb0-pjk5-4ujz-sh2r' https://registry-test.gw-astronomy.org/registry/cous.json
HTTP/2 401
content-type: text/html; charset=UTF-8
date: Fri, 17 Jan 2020 10:37:07 GMT