I’ve always used my fingerprint for 3D authentication, but my last transaction it asked for my PIN instead. I wanted to check my settings but I can’t find where they were 
I don’t hugely mind using my PIN instead, but I was wondering why it had changed?
Have you updated the app recently? I’ve found a couple of times that fingerprint auth has been turned off after an update.
I can’t even find where the setting for fingerprint authentication is to check! Any tips on finding it? 
Account > Drop down menu > Settings and profile > Settings button (top right) > Touch ID for authentication
Thankyou! I couldn’t spot that settings menu for looking - switched it back on now 