     advanced: [
       { permission   : 'update credential', validateWith: Validators.own }
       {
-        permission   : 'update credential'
-        validateWith : Validators.group.resource()
+        permission   : 'modify credential'
+        validateWith : accessValidator { accessLevel: ACCESSLEVEL.READ }
       }
       { permission   : 'modify credential', superadmin: yes }
     ]

    advanced: [
      { permission   : 'update credential', validateWith: Validators.own }
      {
        permission   : 'update credential'
        validateWith : Validators.group.resource { mode: 'w' }
      }
      { permission   : 'modify credential', superadmin: yes }
    ]

    advanced: [
      { permission   : 'update credential', validateWith: Validators.own }
      {
        permission   : 'modify credential'
        validateWith : accessValidator { accessLevel: ACCESSLEVEL.READ }
      }
      { permission   : 'modify credential', superadmin: yes }
    ]
