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WARNING: Service injection in GORM entities is disabled by default since Grails 3.2.8. Read documentation about https://docs.grails.org/latest/ref/Domain%20Classes/Usage.html#_spring_autowiring_of_domain_instances[Spring Autowiring of Domain Instances] to learn how to turn autowire on.

Even with autowiring enabled, transient service references (such as `springSecurityService`) are only injected into domain instances that are loaded by GORM from the database. Freshly constructed instances (e.g., `new User(...)`) are plain Groovy objects and will have `null` for all transient service fields. This is particularly important in `BootStrap.groovy`, where newly created domain instances will not have `springSecurityService` available during `beforeInsert()`. See <<core-password-encoding-bootstrap>> for the recommended approach to password encoding when seeding data.