Secret Code can be found in Options -> Support. THIS IS THE MORE IMPORTANT OF THE TWO TO HAVE.Player ID can be found in Friend -> ID Search.I see way too many people making help posts here about losing their account and not having either number. Write them down, save them in a document on your computer, email them to yourself, do whatever you need to so you don't lose them. Personally, I took screenshots of both then uploaded them to my imgur account. DO NOT store them on the same device that you have PAD installed on because if it dies then you probably won't be able to get your secret code and player ID.
It's Ganesha rank inflation time :)
Ran the first of these dungeons. Didn't realize there would be a large sum of coins included in the gift dungeons. I'll be using Ganesha in the future to maximize the coin rewards of each clear!
Tomorrow and day after as well for the other 2 piis.