The Special Cards in your Special Wallet are already protected by your account username and password.
When logging into the iOS or Android apps your Special Wallet will be protected by Touch/Face ID (on iOS) or a Passcode that you will be asked to create (on Android).
Of course, the best and most secure way to protect your access to Special Cards through the apps is to put a passcode on your device.
To setup a passcode for an Apple iPhone, follow the below steps.
Go to Settings
Touch/Face ID & Passcode
Enable Touch/Face ID for iPhone Unlock
Turn Passcode On
Require Passcode to be set to Immediately
For more support information on Apple iPhone, please visit www.apple.com/support/iphone
To setup a passcode for an Android phone, follow the below steps.
Go to Settings
Security
Screen lock
Select Pattern, Pin or Password
Setup the preferred method of locking the device
For more support information on Android phones, please visit https://support.google.com/android/