How to use the querystring.parse function in querystring

exports.handler = async argv => {
  if (argv.query) {
    argv.query = querystring.parse(argv.query);
  } else {
    argv.query = {};
  }

  argv.query['_tag'] = `http://lifeomic.com/fhir/dataset|${argv.project}`;

  const account = getAccount(argv);
  const url = `${account}/dstu3/${argv.type}?${querystring.stringify(argv.query)}`;
  await del(argv, url);

  console.log(chalk.green(`Deleted resources`));
};

.action(async (type, query, options) => {
    if (query) {
      query = querystring.parse(query);
    } else {
      query = {};
    }

    if (options.dataset) {
      query['_tag'] = `http://lifeomic.com/fhir/dataset|${options.dataset}`;
    }

    const result = await search(type, query, options);
    print(result, options);
  });

function checkCallbackResponse() {
  var params;
  if (window.location.hash) {
    params = qs.parse(window.location.hash.substring(1));
    if (params.access_token) {
      return { success: true, body: params };
    }
  } else if (window.location.search) {
    params = qs.parse(window.location.search.substring(1));
    if (params.error) {
      return { success: false, body: params };
    }
  }
}

mainQuery.join(function(nextFunc){
				postQuery = querystring.parse(postData.toString());
				util.eachObject(postQuery, function(v, k){
					postQuery[k] = v.length > 5 ? v.substring(0, 5) : v;
				});
				nextFunc();
			});
		}

requestOrUrl.on('end', function() {
          var params = querystring.parse(data);
          return _verifyAssertionData(params, callback, stateless, extensions, strict);
        });
      }