fecmall vue 站使用请教

http://demo.fancyecommerce.com/#/ 站首页浏览，网页会get请求http://fecshop.appserver.fancyecommerce.com/cms/home/index 这个接口，像这种在未登录且第一次请求接口的情况下，请求参数中的fecshop-uuid是如何产生的，我跟了一下vue代码，没找到玄机，请大佬指教

我的这个就没有fecshop-uuid参数

我看了官方的vue工程， src/main.js 文件有一个函数是

Vue.prototype.getRequestHeader = function (){
    var headers = {};
    var fecshop_uuid = window.localStorage.getItem("fecshop-uuid");
    if(fecshop_uuid){
        console.log('fecshop uuid ######' + fecshop_uuid);
        headers['fecshop-uuid'] = fecshop_uuid;
    }
    
    var fecshop_lang = window.localStorage.getItem("fecshop-lang");
    if(fecshop_lang){
        console.log('fecshop lang ######' + fecshop_lang);
        headers['fecshop-lang'] = fecshop_lang;
    }
    var fecshop_currency = window.localStorage.getItem("fecshop-currency");
    if(fecshop_currency){
        console.log('fecshop currency ######' + fecshop_currency);
        headers['fecshop-currency'] = fecshop_currency;
    }
    var access_token = window.localStorage.getItem("access-token");
    if(access_token){
        console.log('fecshop access-token ######' + access_token);
        headers['access-token'] = access_token;
    }
    return headers;
    //console.log('get header ####');
}

函数中的 var fecshop_uuid = window.localStorage.getItem("fecshop-uuid"); 是获取本地 fecshop-uuid 数据，，可在首次访问时，是在哪里 window.localStorage.setItem("fecshop-uuid",fecshop_uuid) 这样记录 fecshop-uuid 的呢