Humans can be forgetful; it happens to everyone. So, in case you ever forget your withdrawal pin, it's a quick fix.
Proceed to SETTINGS PAGE
Select SECURITY
Choose AUTHENTICATION.
Then, click on "Reset Pin."
The system will send a reset pin code to your registered email address.
Then you only need to enter this code and a new pin.
Easy, peasy.
You can learn how to set Withdrawal Pin, here