error getting list TypeError: res.forEach is not a function

getting tis error on a bit of js error getting list TypeError: res.forEach is not a function

API.dataObjectList('user_pictures', filter, orderBy, userKey2, pageSize).then((res) => {
  debug_log("my list ", JSON.stringify(res));

  res.forEach(function(element) {
    debug_log("say hello ")
  });

}).catch(function(error) {
  debug_log("error getting list " + error);
});

not sure where the problem is

debug_log("my list ", JSON.stringify(res)); give me:

  my list 
  {"prev":null,"objects":[
  {"channel_room":null,"group":null,"links":{"self":"**************"},
  "userPhotoName":"kevin","photos":{"type":"file","value":"**************b0fb5df7289ae43a396cb.jpg"},"theDate":"9/1/2018","revision":1},
  {"channel_room":null,"group":null,"links":{"self":"**************"},
  "userPhotoName":"kevin","photos":{"type":"file","value":"**************59b474815583d7d5f9eb2.jpg"},"theDate":"9/1/2018","revision":1}],
  "next":"**************"}

fixed by using res.objects.forEach(function(element....