How to reset or find out Pin when using Apple Pay
I am new to using Apple Pay. I tried to use it at Whole Foods store and after I touched the iPhone for Apple Pay, it asked for a Pin. I tried my debit card and it didn't work. Is this a Pin that was set up though Apple Pay? I tried deleting the card and putting it back on Apple Pay but it didn't prompt me to enter a Pin then. I have read that using credit is best but I was under the impression you could just whip out you phone and use it to pay and not need to touch nothing. I just would like to find out what Pin they are requesting. Can anyone help me?
iPhone 6, iOS 9.0.2