In the Cost Statistics section, you can view the usage and expiration status of each CU package to track your consumption. To facilitate unified billing across multiple authentication methods, the prepaid model for CU packages does not currently provide detailed usage data in Billing Management or through related APIs. More detailed usage query pages and APIs will be released in the future to help you estimate your usage.
The consumption rate for each authentication method is: 0.010 CU per TOTP authentication, 0.045 CU per SMS authentication, 0.036 CU per mobile number authentication, 0.015 CU per WebAuthn authentication, and 0.015 CU per IFAA authentication.
CU packages have a default validity period of one year, as specified in your order. Expired packages cannot be used. When you have multiple CU packages, the one with the earliest expiration date is consumed first.
Unlike typical resource packs, the service is automatically suspended when your CU balance is depleted. It does not automatically switch to a postpaid (pay-as-you-go) model that draws from your Alibaba Cloud account balance. Therefore, ensure you maintain a sufficient CU balance to prevent service interruptions.