code: function shortcutRequest(req){
    req.get = shortcut(req, 'GET')
    req.post = shortcut(req, 'POST')
    req.put = shortcut(req, 'PUT')
    req.patch = shortcut(req, 'PATCH')
    req['delete'] = shortcut(req, 'DELETE')
    req.options = shortcut(req, 'OPTIONS')
    req.head = shortcut(req, 'HEAD')
    req.trace = shortcut(req, 'TRACE')
    req.connect = shortcut(req, 'CONNECT')
    return req
  }
docs: to decorate promisified request function