//leave match room
public MatchRoom Leave(int userId)
{
int roomId = uidRoomIdDict[userId];
MatchRoom room = roomIdModelDict[roomId];
room.Leave(userId);
uidRoomIdDict.Remove(userId);
if (room.IsEmpty())
{
roomIdModelDict.Remove(roomId);
roomQueue.Enqueue(room);
}
return(room);
}
