attaching shopify_cart_token as external id
browser.cookie.get('cart').then(function(cart_token){
fetch("//io.v2.customerlabs.co/externalIds?shopify_cart_token=" + cart_token + "&id=" + window.CLabsgbVar.appId + "&uid=" + window.CLabsgbVar.generalProps.uid);
}).catch(function(e){
console.log("clabs cart token collection issue", e)
});