If you've forgotten your PIN or want to change it, you can do so your account settings.
This is how it works:
1. Open the menu in the app and click on "Account"
2. Scroll down and click on the "Security" section.
3. Under "PIN" select "Change PIN"
4. Enter your password to create your new PIN
5. Enter your new 4-digit PIN
6. Repeat your entry to confirm your new PIN. Done!
You will also receive a confirmation by e-mail. Please keep your password and PIN to yourself so that your account remains secure.