text: var express = require('express')
  var router = express.Router()
  var groupController = require('../controllers/groups')
  router.get('/', groupController.group_list)
  router.get('/:id', groupController.group_detail)
  router.post('/', groupController.group_create)
  router.delete('/', groupController.group_delete)
  router.put('/', groupController.group_update)
  module.exports = router
  