Unathorized 401 when trying to access cloud API from AWS EC2

[hardfi]

Hi,

I've just built a funcionality in my Node.js app that allows me to create Jira issues via Jira API. I'm using simple login with e-mail address and token + 'request' library to make requests. It works great when I launch it from in my local environment but I keep on getting 401 - Unathorized when I deploy the app to AWS EC2. What could be the reason for this issue? Below is the example request that works when fired locally:

const headers = {
  'Authorization': 'Basic ' + Buffer.from(jiraUser + ':' + jiraPassword).toString('base64'),
  'X-Atlassian-Token': 'no-check',
  'Content-Type': 'application/json',
};

router.get('/jira/priority', AuthGuard.verify, (req, res, next) => {
  request.get({url: jiraUrl + 'priority', headers: headers}, (err, resp) => {
    // logic
  });
});

The only thing that comes to my mind is the request origin, that might be different when firing requests from AWS. 

Thanks.