使用Vue-router进行Firebase验证

问题是vue-router的beforeEnter比main.js中的beforeCreate挂钩更早被触发并且有第二个延迟，而在重新加载vuex动作之后将用户置于状态 . 这导致用户被退回到登录页面 .

如何延迟vue-router的beforeEnter检查，直到vuex将授权用户设置为状态 .

router.js

import Vue from 'vue'
import Router from 'vue-router'
import Home from '../views/Home.vue'
import auth from './auth'

Vue.use(Router)

export default new Router({
  mode: 'history',
  routes: [
    {
      path: '/',
      name: 'home',
      component: Home
    },
    {
      path: '/reservations',
      name: 'Reservations',
      component: () => import('@/views/Reservation/Reservations.vue'),
      beforeEnter: auth
    }
  ]
})

auth.js

import { store } from "../store";

export default (to, from, next) => {
    if(store.getters.user) {
        next()
    } else {
        console.log('auth')
        next('/signin')
    }
}

main.js

import Vue from 'vue'
import App from './App.vue'
import router from './router/router'
import {store} from './store'
import firebase from 'firebase/app'
import 'firebase/app'    
import config from './config'    

new Vue({
  router,
  store,
    render: h => h(App),
    beforeCreate() {
        firebase.initializeApp(config).firestore().settings({timestampsInSnapshots: true})
        console.log('main')     
        this.$store.dispatch('authCheck')   
    }
}).$mount('#app')

存储/ user.js的

import firebase from 'firebase/app'
import 'firebase/auth'

export default{
    state: {
        user: null
    },
    mutations: {
        setUser (state, payload) {
      state.user = payload
        }       
  },
    actions: {
        authCheck({ commit }) {
            commit('setLoading', true)
            firebase.auth().onAuthStateChanged((user) => {              
                if(user){
                    commit('setUser', {
                        id: user.uid,
                        name: user.displayName,
                        email: user.email
                    })
                    commit('setLoading', false)
                }
            })
        },      
        logout({commit}) {
            firebase.auth().signOut()
            commit('setUser', null)
        }
    },
    getters: {
        user (state) {
            return state.user
        }
    }
}

在控制台中，我首先看到来自beforeEnter check的'auth'，然后是来自beforeCreate的'main' . 如何在路由器检查之前触发'authCheck'