Getting response in postman but getting error in node js

I'm writing a node js program to consume a SOAP service and the code is as below.

var xml = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tns0="http://ei/crm/billing_account_retrieval_crm34x1" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><tns0:GetBillAcctDetail><GetBillAcctDetailRequest><BillAccountId>XA2GENMR</BillAccountId></GetBillAcctDetailRequest></tns0:GetBillAcctDetail></soapenv:Body></soapenv:Envelope>';

var http = require('http');

var request = require("request");
var utf8 = require('utf8');
var auth = 'Basic ' + new Buffer("DPINSURITY1" + ':' + "default").toString('base64');

request.post({
    url: "https://services-st.chubb.com",
    path: "/CRMServices/BillingAccountRetrievalCRM34X1",
    method: "POST",
    headers: {
        'Content-Type': 'application/xml',
        'Authorization': auth

    },
    body: xml
},
    function (error, response, body) {
        console.log("Status Code Received " + response.statusCode + "\n\n");
        console.log("Success " + body + "\n\n");
        console.log("Error " + error + "\n\n");
    });

when I run this, the output that i get is as below.

Status Code Received 500


Success <?xml version="1.0" encoding="UTF-8"?>
<env:Fault xmlns:date="http://exslt.org/dates-and-times" xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"><faultcode
>server</faultcode><faultstring>Internal error occurred</faultstring><faultactor/><detail/></env:Fault>


Error null

when I run the same in postman, I get the result as expected. please refer to the below screenshot.

I'm very new to node as well as SOAP. Please let me know where am I going wrong and how can I fix it.

Thanks

via user3872094