let res = "";
      let postbody = JSON.stringify({
       key: value
      });
      let baseurl = 'baseurl'
      let path = '/any-path'
      const client = http2.connect(baseurl);
      const req = client.request({
       ":method": "POST",
       ":path": path,
       "content-type": "application/json",
       "content-length": Buffer.byteLength(postbody),
      });


      req.on("response", (headers, flags) => {
       for (const name in headers) {
        console.log(`${name}: ${headers[name]}`);
       }

      });
      req.on("data", chunk => {
       res = res + chunk;
      });
      req.on("end", () => {
       client.close();
      });

   req.end(postbody)