improve security.

src/main/kotlin/fr/dcproject/entity/Citizen.kt

@@ -1,12 +1,9 @@
 package fr.dcproject.entity
 
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.UuidEntity
+import fr.postgresjson.entity.*
 import org.joda.time.DateTime
 import java.util.*
 
-
 class Citizen(
     id: UUID = UUID.randomUUID(),
     var name: Name?,
@@ -16,7 +13,8 @@ class Citizen(
     var followanonymous: Boolean? = null,
     var user: User?
 ) : UuidEntity(id),
-    EntityCreatedAt by EntityCreatedAtImp() {
+    EntityCreatedAt by EntityCreatedAtImp(),
+    EntityDeletedAt by EntityDeletedAtImp() {
     data class Name(
         var firstName: String?,
         var lastName: String?,