public void JoinRoom(JoinRoom joinRoom)
{
var userId = GetUserId();
if (userId == null)
{
return;
}
Groups.Add(Context.ConnectionId, joinRoom.RoomId.ToString());
roomService.AddUser(joinRoom.RoomId, userId.Value, Context.ConnectionId, UnixTimeStampToDateTime(joinRoom.LastUpdated));
Clients
.Group(joinRoom.RoomId.ToString())
.updateRoomUsers(GetSerializableRoomMembers(joinRoom.RoomId));
}