I am kind of confused on how you hook up a PS4 controller to PC to play FFXIV.

What bluetooth adapter do I have to buy for PC to get the PS4 controller to work with FFXIV? I see the PS4 blue tooth adapter for PC but it costs around 60-100$ I don't think they are made anymore so people are selling them used for around 60 or more. Is there a different one you can get to use the controller with FFXIV.