how to force "Accept" and override default and null proxy realms?

I would like to always send an Accept unconditionally if the User-Name is test[0-9], but proxy request to default or null realm for all other user names. I tried a configuration with authorize { files suffix } the "suffix" will match on default and null realms. I currently have a line in users file that looks like this: DEFAULT User-Name =~ "test[0-9]", Auth-Type: Accept however regardless of which user makes the request, even the "test" user (which does match), the request is still proxied. If I change "Auth-Type: Reject", then the test user is always rejected, but I am looking for the opposite behavior. Thanks in advance for any help or pointers.