pub fn (mut self Actor) room_joined_members(room_id string) ?[]string {
  mut members := []string{}
	params, code := self.call_get('room/$room_id/joined_members') or { return err }
	if code == 200 {
	  for k,_ in params['joined'].as_map() {
	    members << k
	  }
	}
  return members
}