add missing require statements

app/controllers/spree/credit_cards_controller.rb

@@ -1,3 +1,5 @@
+require 'stripe/credit_card_clone_destroyer'
+
 module Spree
   class CreditCardsController < BaseController
     def new_from_token

lib/stripe/credit_card_clone_destroyer.rb

@@ -13,7 +13,7 @@ module Stripe
         next unless stripe_account = customer.enterprise.stripe_account&.stripe_user_id
 
         customer_id, _payment_method_id =
-          CreditCardCloneFinder.new(card, stripe_account).find_cloned_card
+          Stripe::CreditCardCloneFinder.new(card, stripe_account).find_cloned_card
         next unless customer_id
 
         customer = Stripe::Customer.retrieve(customer_id, stripe_account: stripe_account)

lib/stripe/credit_card_cloner.rb

@@ -15,6 +15,8 @@
 # clone it and look for a card with the same fingerprint (hash of the card number) and
 # that metadata key to avoid cloning it multiple times.
 
+require 'stripe/credit_card_clone_finder'
+
 module Stripe
   class CreditCardCloner
     def initialize(card, stripe_account)
@@ -23,7 +25,7 @@ module Stripe
     end
 
     def find_or_clone
-      cloned_card = CreditCardCloneFinder.new(@card, @stripe_account).find_cloned_card
+      cloned_card = Stripe::CreditCardCloneFinder.new(@card, @stripe_account).find_cloned_card
       cloned_card || clone
     end