Loading an addressable folder from address instead of label?

I am currently using this piece of code to load a list of gameObjects from an addressable folder:

Code (CSharp):

1.         public static void LoadGameObjects(string key, Action<AsyncOperationHandle<IList<GameObject>>> onAllGameObjectsLoaded)
2.         {
3.             Addressables.LoadAssetsAsync<GameObject>(key, null).Completed += onAllGameObjectsLoaded;
4.         }

The thing is, the "key" seem to have to direct to a label, rather than the address. I don't really like using the labels as much, as they clutter up pretty quickly. Is there a way to load from the address?