What's the purpose of deleteInstallation

[multispace88]

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This might be a silly question, but what's the exact purpose of deleteInstallation? I mean, I know it's meant to remove the installation information, but when is it actually triggered?
When installing the app via the /slack/install route, storeInstallation is triggered to store the installation, so I was expecting deleteInstallation would be triggered when the app gets deleted (via Slack -> manage apps -> delete), but that's not the case apparently... So, if you can't track those uninstalls, why even bother cleaning up installations?

[multispace88]

OK, it was indeed silly. By now, I found that you can actually subscribe to the app_uninstalled event.