authRequest 清除没有用的userToken，这样下次不用发送请求

app.js

@@ -59,6 +59,12 @@ App({
     var that = this
     if (!that.globalData.token) {
       var token = wx.getStorageSync('userToken')
+      if (!token) {
+        wx.redirectTo({
+          url: '../mine/mine'
+        })
+        return
+      }
       that.globalData.token = token
       that.request({
         url: `${that.globalData.API_URL}/sessions/new`,
@@ -70,6 +76,9 @@ App({
               content: '请前往 “我的” 页面绑定手机号',
               showCancel: false,
               success: function(res) {
+                // 清除没用的token
+                wx.removeStorage({key: 'userToken'})
+                that.globalData.token = undefined
                 if (getCurrentPages().length > 1) {
                   wx.navigateBack()
                 }