Getting error while authenticating with fba

[azamsolix]

Hi,
I am getting getting while doing authenticating with fba.

Error: Non-whitespace before first tag.
Line: 0
Column: 1
Char: 4

[azamsolix]

const spauth=require('node-sp-auth');
const request = require('request-promise');
spauth
.getAuth('http://sharepoint20/sites/ecs', {
username: 'username',
password: 'aaaa@123!',
fba : true
})
.then(data => {
let headers = data.headers;
headers['Accept'] = 'application/json;odata=verbose';

request.get({
  url: 'http://sharepoint20/sites/ecs/_api/web',
  headers: headers,
  json: true,
  rejectUnauthorized: false
}).then(response => {
  console.log(response.d.Title);
});

});