To find your Player ID and PIN in Zynga Poker:
Tap the gear wheel icon in the lower right corner of the screen.
The number listed under Zynga ID is your UID/ZID for Mobile Poker.
Click on the Get Data Request Pin button to view the PIN.
You will now be able to see your Player ID and PIN.
Note: You can also send an email privacy@zynga.com to make a Personal Data Request.