What is customerPaymentMethodCreditCardUpdate API's sessionId argument?
How do I get the session id?
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Updating an order's billing address is not possible. The billing address field is immutable after an order is created.
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We encounter problems.
Shopify makes an order by calling subscriptionBillingattemptCreate API.
The order's billing address's name is a credit card's first name and last name. I think it's not a problem in the English region. In the case of Japan, We expect a name in Kanji (like 齊藤 正浩).
Also, A billing address's address2 (maybe building name) is blank.