What is the authentication method for this web-application? I would suggest to you to have delegated authentication (ZAUTHENTICATE), get the Cookie there and inspect it

For example, in the sample here ZAUTHENTICATE checks OAuth2 token. You can check Cookie there

Adjust also GetCredentials accordingly

No way, unfortunately. Unless you can use ODBC from your project to access Caché, not InterSystems.Data.CacheClient.dll

The basic solution -- don't enable "Retain All Log Files". Then you would have only two log files -- current one, and old one which is replaced every time current log reaches its Log Rotation Size

For more complex strategies -- yes, use OS tools. E.g. logrotate in linux

https://docs.intersystems.com/iris20243/csp/docbook/DocBook.UI.Page.cls?...