# Sentinel activities Sentinel activities are used to track and manage user authentication attempts, including successful and failed attempts. Based on your sentinel policy settings, Logto will automatically block users after a certain number of failed attempts. This helps to prevent unauthorized access and protect sensitive data. ## Operations - [Bulk delete sentinel activities](https://openapi.logto.io/operation/operation-deletesentinelactivities.md) [Powered by Bump.sh](https://bump.sh)