Help Center> FunctionGraph> Best Practices> Integrating with CTS to Analyze Login/Logout Security> Processing Operation Records
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Processing Operation Records

When a user performs login or logout using an account, the subscription service log will be triggered and a function will be directly invoked. The system then checks whether the IP address of the current login or logout account is in the whitelist based on function code. If the IP address is not in the whitelist, Simple Message Notification (SMN) will send notifications shown in Figure 1.
Figure 1 Email notification

The email contains the unauthorized IP address and user operation (login or logout).

On the Monitoring tab page of the function, check the number of invocations, as shown in Figure 2.
Figure 2 Function metrics