Werk #17997: Fix automation user losing password hash

Component	Setup
Title	Fix automation user losing password hash
Date	Jul 2, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.4.0p7 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

When editing an automation user and storing it again without setting a new automation secret caused Checkmk to "forget" the password hash. Therefore this automation user is then no longer able to login.

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