P12 PFX NodeJS Request

I am trying to make a request with a p12 file or a pfx, but I can't get it to work. If I use PEM and KEY the code works fine. But Azure Keyvault does not support PEM and KEY. Is there an alternative that works with KEY/PEM certificates?

This is how I generated a p12/pfx file if that is the problem.

openssl pkcs12 -export -out certificate.pfx -inkey 1231181189.key -in 1231181189.pem -certfile CA.pem

Here is an example code, if I comment out cert and key the system does not work,

Error: read ECONNRESET

But if I comment out pfx and passphrase and use pem and key the connection work.

var request = require('request');
var fs = require('fs');
var path = require('path');
var certFile = __dirname + '/certs/1231181189.pem';
var keyFile = __dirname + '/certs/1231181189.key';

var options = {
  method: 'POST',
  url: 'https://mss.cpc.getswish.net/swish-cpcapi/api/v1/paymentrequests',
  headers: { 'Content-Type': 'application/json' },
  agentOptions: {
    cert: fs.readFileSync(certFile),
    key: fs.readFileSync(keyFile),
    pfx: fs.readFileSync(__dirname + '/certs/certificate.pfx'),
    passphrase: 'swish'
  },
  body: {
    payeePaymentReference: '0123456789',
    callbackUrl: 'https://example.com/api/swishcb/paymentrequests',
    payerAlias: '4671234768',
    payeeAlias: '1231181189',
    amount: '100',
    currency: 'SEK',
    message: 'Kingston USB Flash Drive 8 GB'
  },
  json: true
};

request(options, function (error, response, body) {
  if (error) throw new Error(error);

  console.log(response.headers);
  console.log(body);
});

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