I can’t connect to the home pod because it requires some kind of number or code that was on the box. I don't have the box, I threw it away. What should I do?

Last summer I was given a home pod, since I was on vacation and there was little space in my suitcase, I threw away the box and instructions from the device. I thought that I could look up instructions on the Internet and didn’t think that the code I needed would be on the box or somewhere else, now I can’t connect to the home pod because it requires some kind of number or code that was on the box . What should I do?