docs: def dettach_igw(self, req, driver):
          """Dettach network from Internet gateway
          :Param  req
          :Type   object Request
          """
          response = driver.dettach_igw(req.params)
          data = {
              'action': 'attach_igw',
              'controller': 'network',
              'id': id,
              'cloud': req.environ['calplus.cloud'],
              'response': response
          }
          return data