Optional data to send to the server with the request. How to send data: `json` to serialise JSON data and add _Content-Type: application/json_ header, and `form` for url-encoded transmission with _Content-Type: application/x-www-form-urlencoded_. _Multipart/form-data_ must be implemented manually. Headers to use for the request. By default, a single User-Agent header with _Mozilla/5.0 (Node.JS) aqt/{version}_ value is set. Add the `Accept-Encoding: gzip, deflate` header to indicate to the server that it can send a compressed response. The timeout after which the request should fail. What HTTP method to use in making of the request. When no method is given and `data` is present, defaults to `POST`. Whether to return a buffer instead of a string. Whether to stop the request after response headers were received, without waiting for the data.