type: string
             unique: true
             length: 254
-        pseudonym:
-            type: string
-            length: 32
         forename:
             type: string
             length: 32
+            nullable: true
         surname:
             type: string
             length: 32
+            nullable: true
         password:
             type: string
             length: 60
             type: boolean
             options:
                 default: true
+        enable:
+            type: boolean
+            options:
+                default: true
         created:
             type: datetime
         updated:
 #see if usefull: https://stackoverflow.com/questions/34523699/how-to-extend-doctrine-entity-in-another-bundle
 #            joinTable:
 #                name: groups_users
+    lifecycleCallbacks:
+        preUpdate: ['preUpdate']