product_reviews.js

const csv = require('fast-csv');
const xml = require("js2xmlparser");
const fs = require('fs');
const doc = [];
const options = {
	declaration:{
		include: false
	}
}

const stream = fs.createReadStream("input.csv");

csv
 .fromStream(stream, {delimiter : ';', headers: true})
 .on("data", function(data){
     let name = data.name;
     let content = data.content;
     let review_url = data.review_url;
     let rating = data.rating;
     let product_url = data.product_url;
     let review_timestamp = data.review_timestamp;

     let obj = {
     	"reviewer": {
     		"name": name
     	},
     	"review_timestamp": review_timestamp,
     	"content": content,
     	"review_url": {
     		"@": {
     			"type": "singleton"
     		},
     		"#": review_url
     	},
     	"ratings": {
     		"overall": {
     			"@": {
     			"min": 1,
     			"max": 5
     			},
     			"#": rating
     		}
     	},
     	"products": {
     		"product": {
     			"product_url": product_url;
     		}
     	}
     };
     doc.push(obj);
 })
 .on("end", function(){
 		doc.forEach(function(row){
 			fs.appendFile('output.xml', xml.parse("review", row, options) + '\n', 'utf-8', (err) => {
 					if (err) throw err;
 				});
 			});
 		fs.appendFile('output.xml', "</reviews></feed>", (err) => {
 				if(err) throw err;
 			});
 });

Hi, I tried to add this code to my Shopify store, by adding a new .js file in Assets but I can't see if it works...
What is the xml URL?
My codding knowledge is very limited.
Thank you.