code: def _find_user_channel(self, username):
  		
  		user_id = self.slacker.users.get_user_id(username)
  		im = user_id and self.slacker.im.open(user_id).body['channel']['id']
  		return im and self.slack.server.channels.find(im)
docs: Use slacker to resolve the username to an opened IM channel