授权后跳转res.authSetting['scope.userInfo']为空

授权成功后跳转首页，res.authSetting[‘scope.userInfo’]为空，仍然提示再次授权，是开发者工具问题？还是我写错了

success: function (res) {

var utoken = res.data.data.utoken;

//设置用户缓存

wx.setStorageSync(‘utoken’, utoken);

wx.switchTab({

url: ‘/pages/index/index’

})

}