To replace your existing credit card in the app, follow these simple steps:

1. Tap on the "REMOVE CARD" option in the top left drop-down menu.

2. After removing the old card, tap on "ADD CARD" from the same drop-down menu.

3. Enter the details of your new credit card as prompted.

4. Make sure to double-check your information before submitting it.

That's it! Your new credit card should now be updated and ready to use in the app.