app.post('/new-meeting', (req, res) => {

  const headers = {
    'Content-Type': 'application/json',
    Accept: 'application / json',
    Authorization: 'OAuth oauth_token=' + originalToken
  };

  console.log('-----------------------------------------------------------')
  console.log('Acess Token:');
  console.log('OAuth oauth_token=' + originalToken);
  console.log('-----------------------------------------------------------')

  const meetingBody = {
    subject: 'string',
    starttime: '2018-03-20T08:15:30-05:00',
    endtime: '2018-03-20T09:15:30-05:00',
    passwordrequired: true,
    conferencecallinfo: 'string',
    timezonekey: 'string',
    meetingtype: 'immediate'
  };

  return fetch('https://api.getgo.com/G2M/rest/meetings', {
    method: 'POST',
    body: meetingBody,
    headers: headers
  }).then(response => {

    console.log('response:');
    console.log(response);


    response
      .json()
      .then(json => {
        res.send(json);
        console.log(req.headers);
      })
      .catch(err => {
        console.log(err);
      });
  });
});

{
  "error": {
    "resource": "/rest/meetings",
    "message": "invalid json"
  }
}