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const request = require('superagent')

Get 

getWhatever(fnc){
  return request.get(`${cfg.rest_api_endpoint}/whatever`)
    .end(function(err, res){
      if(err) fnc(err)
      else{ fnc(null, JSON.parse(res.text)) }
    });
}
  
Post
  
postWahtever(id, name, sizeX, sizeY, sizeZ, maxLoad, fnc ) {
 return request.post(`${cfg.rest_api_endpoint}/whatever`)
  .set('Content-Type', 'application/json')
  .send({"id": id, "name": name, "sizeX": sizeX })
  .end(function (error, response) {
    if(error){ fnc(error) }
    else{ fnc(null, response) }
  })
}