A. Consider using a prepaid credit card or a virtual credit card service. These options allow you to create a card number that can be used for online transactions without linking to your main bank account. This way, you can sign in without exposing your primary financial information.

B. If you have a family member or friend who is willing to help, you can ask them to use their credit card for the sign-in process. Just ensure that you have their permission and that you can manage the account responsibly.