static Map slackGetUserInfo(S token, S userID) {
  S url = "https://slack.com/api/users.info";
  S postData = "token=" + urlencode(token) + "&user=" + urlencode(userID);
  S data = doPostWithTimeout(postData, url, slackSetTimeout_get());
  //print(data);
  ret (Map) jsonDecodeMap(data).get("user");
}