NextiraOne Mexico? I thought the whole North American operation was sold to Blackbox?
Anyway... check out AXL's AuthenticateUser. the only catch is that you need CCM5 or above and there's no corresponding mechanism.
The best you you can do for ccm4 is using device association and send a request to the authentication url (in the enterprise parameters).. it takes a controlling user's login and password and returns authorized or unauthorized.