Default auth-method in p:http-request

If you specify username/password in c:request, but not auth-method, what
should happen? I can see three possible options here:

- p:http-request will use Basic authentication (I think that is what
Calabash does at the moment)
- p:http-request issues a normal (no authentication) request
- p:http-request fails ("you always have to specify an authentication
method")

Regards,
Vojtech