const split = require('split-array-stream');
const through = require('through2');

const array = [
  { id: 1, user: 'Dave' },
  { id: 2, user: 'Stephen' }
];

const stream = through.obj();

stream.on('data', (item) => {
  // { id: 1, user: 'Dave' }
  // ...later...
  // { id: 2, user: 'Stephen' }
});

split(array, stream).then((streamEnded) => {
  if (!streamEnded) {
    stream.push(null);
    stream.end();
  }
}).catch(console.error);

function getAllUsers() {
  var stream = through.obj();

  var requestOptions = {
    method: 'get',
    url: 'http://api/users',
  };

  request(requestOptions, onResponse);

  function onResponse(err, response) {
    split(response.users, stream).then((streamEnded) => {
      if (streamEnded) {
        return;
      }

      if (response.nextPageToken) {
        requestOptions.pageToken = response.nextPageToken;
        request(requestOptions, onResponse);
        return;
      }

      stream.push(null);
      stream.end();
    });

  });

  return stream;
}

getAllUsers()
  .on('data', function (user) {
    // An item from the `response.users` API response
  })
  .on('end', function () {
    // All users received
  });