You can view the charging keys in your account at any time.
In the user portal:
Login to the user portal and navigate to the Charging Key/RFID Card section. Here you will see a list of all of the charging keys and cards associated with this account.
In the app:
Login and navigate to the Account section in the menu on the bottom of the screen. Tap Charging Key/Card and see all of the charging keys or cards associated with your account.