examples(auth-jwt): use named store export to prevent warning (#5775)

examples/auth-jwt/store/index.js

@@ -1,32 +1,26 @@
-import Vuex from 'vuex'
-
 const cookieparser = process.server ? require('cookieparser') : undefined
 
-const createStore = () => {
-  return new Vuex.Store({
-    state: {
-      auth: null
-    },
-    mutations: {
-      setAuth(state, auth) {
-        state.auth = auth
-      }
-    },
-    actions: {
-      nuxtServerInit({ commit }, { req }) {
-        let auth = null
-        if (req.headers.cookie) {
-          const parsed = cookieparser.parse(req.headers.cookie)
-          try {
-            auth = JSON.parse(parsed.auth)
-          } catch (err) {
-            // No valid cookie found
-          }
-        }
-        commit('setAuth', auth)
+export const state = () => {
+  return {
+    auth: null
+  }
+}
+export const mutations = {
+  setAuth(state, auth) {
+    state.auth = auth
+  }
+}
+export const actions = {
+  nuxtServerInit({ commit }, { req }) {
+    let auth = null
+    if (req.headers.cookie) {
+      const parsed = cookieparser.parse(req.headers.cookie)
+      try {
+        auth = JSON.parse(parsed.auth)
+      } catch (err) {
+        // No valid cookie found
       }
     }
-  })
+    commit('setAuth', auth)
+  }
 }
-
-export default createStore