code: def get_proxy(self, input):
          
          from ..authentication_process.objects import Authentication
          agent_id = input.user.username
          host = settings.HOST
          url_path = ('/handcar/services/authentication/agentkeys/' + agent_id +
                      '?proxyname=' + settings.APP_KEYS[host.lower()])
          authentication = Authentication(agent_id, self._get_request(url_path))
  
          return rules.Proxy(authentication=authentication)
docs: Gets a proxy.
  
          :param input: a proxy condition
          :type input: ``osid.proxy.ProxyCondition``
          :return: a proxy
          :rtype: ``osid.proxy.Proxy``
          :raise: ``NullArgument`` -- ``input`` is ``null``
          :raise: ``OperationFailed`` -- unable to complete request
          :raise: ``PermissionDenied`` -- authorization failure
          :raise: ``Unsupported`` -- ``input`` is not of this service
  
          *compliance: mandatory -- This method is must be implemented.*