Type:
| "adjustment"
| "applied_to_invoice"
| "checkout_session_subscription_payment"
| "checkout_session_subscription_payment_canceled"
| "credit_note"
| "initial"
| "invoice_overpaid"
| "invoice_too_large"
| "invoice_too_small"
| "migration"
| "unapplied_from_invoice"
| "unspent_receiver_credit"