[
   {rabbit, 
     [
       {auth_backends, [rabbit_auth_backend_internal, rabbit_auth_backend_http]},
       {loopback_users, []}
     ]
   },
   {rabbitmq_auth_backend_http,
     [{user_path,     "http://localhost/auth/user"},
       {vhost_path,    "http://localhost/auth/vhost"},
       {resource_path, "http://localhost/auth/resource"}
     ]
   }
 ].