You have to have a registered account on the WDW website I believe. And the best way for me always ( in the past ) was to book a mock vacation for what & where I wanted to go. Just to generate activity& possible pins....Sometimes we got cards sent to us, & think some emails, but I remember a CM telling me sometimes nothing is sent..
So what I would suggest is calling CRO & inquiring about a trip, and ask them if there is a pin code associated w/ your account...Can't hurt?