How to use the @aws-sdk/querystring-builder.buildQueryString function in @aws-sdk/querystring-builder

return new Promise((resolve, reject) => {
      // if the request was already aborted, prevent doing extra work
      if (abortSignal && abortSignal.aborted) {
        const abortError = new Error("Request aborted");
        abortError.name = "AbortError";
        reject(abortError);
        return;
      }

      const { hostname, method, port, protocol, path, query } = request;
      const queryString = buildQueryString(query || {});

      // create the http2 request
      const req = this.getSession(
        `${protocol}//${hostname}${port ? `:${port}` : ""}`
      ).request({
        ...request.headers,
        [constants.HTTP2_HEADER_PATH]: queryString
          ? `${path}?${queryString}`
          : path,
        [constants.HTTP2_HEADER_METHOD]: method
      });

      req.on("response", headers => {
        const httpResponse = new HttpResponse({
          statusCode: headers[":status"] || -1,
          headers: getTransformedHeaders(headers),

return new Promise((resolve, reject) => {
      // if the request was already aborted, prevent doing extra work
      if (abortSignal && abortSignal.aborted) {
        const abortError = new Error("Request aborted");
        abortError.name = "AbortError";
        reject(abortError);
        return;
      }

      // determine which http(s) client to use
      const isSSL = request.protocol === "https:";
      const queryString = buildQueryString(request.query || {});
      const nodeHttpsOptions: https.RequestOptions = {
        headers: request.headers,
        host: request.hostname,
        method: request.method,
        path: queryString ? `${request.path}?${queryString}` : request.path,
        port: request.port,
        agent: isSSL ? this.httpsAgent : this.httpAgent
      };

      // create the http request
      const req = (isSSL ? https : http).request(nodeHttpsOptions, res => {
        const httpResponse = new HttpResponse({
          statusCode: res.statusCode || -1,
          headers: getTransformedHeaders(res.headers),
          body: res
        });

export function formatUrl(request: HttpRequest): string {
  let { protocol, path, hostname, port, query } = request;
  if (protocol && protocol.substr(-1) !== ":") {
    protocol += ":";
  }
  if (port) {
    hostname += `:${port}`;
  }
  if (path && path.charAt(0) !== "/") {
    path = `/${path}`;
  }
  let queryString = query ? buildQueryString(query) : "";
  if (queryString && queryString[0] !== "?") {
    queryString = `?${queryString}`;
  }
  return `${protocol}//${hostname}${path}${queryString}`;
}