HTTP.post(`${api}/token`, {
  params: {
    grant_type: 'password',
    client_id: 'some_id',
    client_sectet: 'some_secret',
    username: 'username',
    password: 'password'
  }
}, (e, r) => {
  if (e) {
    console.error(e);
  } else {
    console.log(r);
  }
});

POST http://.../token 400 (Bad Request)
Error: failed [400] {"error":"invalid_request","error_description":"The grant type was not specified in the request"}