code: def enable_app(self, appname):
          
          res = self._make_ocs_request('POST', self.OCS_SERVICE_CLOUD,
                                       'apps/' + appname)
          if res.status_code == 200:
              return True
  
          raise HTTPResponseError(res)
docs: Enable an app through provisioning_api
  
          :param appname:  Name of app to be enabled
          :returns: True if the operation succeeded, False otherwise
          :raises: HTTPResponseError in case an HTTP error status was returned