Free 6 Months Apple Music

I purchased a new iPhone 15 pro, with that you can get the 6 months of Apple Music free. I already have Apple Music. I would like to take advantage of this savings for a few months. Does anyone know how to do this? Can I do this without canceling my account and starting over? Or will that not even work? I would hope the offer could be available to all just as my Apple TV offer updated. Thanks!!