private (string FirstName, string LastName) GetRealName(string userId)
{
SlackAPI.User user = null;
var mre = new ManualResetEvent(false);
_slackClient.GetInfo(response => {
user = response.user;
mre.Set();
}, userId);
mre.WaitOne();
return(user.profile.first_name, user.profile.last_name);
}