How to save agent?

[Najeeb-00]

I've made a simple tic-tac-toe game and trained a dqnAgent vs a random agent and got good results. But I don't know how to save the agent/ model to use it later.
I know this question must sound trivial but I could not find an answer on my own, I am a beginner in ML stuff and this was my first project. help is appreciated.

[JocyeI]

when training......torch.save(model_name)