在router.addRoutes()方法之前，添加
router.options.routes=accessRoutes
片段代码如下：
// generate accessible routes map based on roles
// await store.dispatch('user/generateRoutes')
const accessRoutes = await store.dispatch('user/generateRoutes',{ root: true })
router.options.routes=accessRoutes
console.log(accessRoutes)
// dynamically add accessible routes
router.addRoutes(accessRoutes)