The Quick Access Code is a 5-digit code you can use to quickly log into your mobile app.
When downloading the Suits Me app, you will be asked if you want to set up ‘Quick Access’ using a 'Quick Access Code’. Using it gives quicker than using a username and password.
It is completely separate to the PIN attributed to your debit card.
You can also use your thumbprint or Face ID as well if your mobile device supports biometric security features.