diff --git a/main.py b/main.py
index 9b20e3e..faab7a3 100755
--- a/main.py
+++ b/main.py
@@ -25,6 +25,13 @@ def authentik_get_users():
     json_object = json.loads(resp._content)
     return(json_object['results'])
 
+def authentik_get_app_used_by(slug):
+    url = authentik_api_url + '/core/applications/' + slug + '/used_by/'
+    headers = {'accept': 'application/json', 'Authorization': "Bearer " + authentik_api_key}
+    resp = requests.get(url, headers=headers)
+    json_object = json.loads(resp._content)
+    return(json_object)
+
 def authentik_get_groups():
     url = authentik_api_url + '/core/groups/'
     headers = {'accept': 'application/json', 'Authorization': "Bearer " + authentik_api_key}
@@ -32,6 +39,13 @@ def authentik_get_groups():
     json_object = json.loads(resp._content)
     return(json_object['results'])
 
+def authentik_get_apps():
+    url = authentik_api_url + '/core/applications/'
+    headers = {'accept': 'application/json', 'Authorization': "Bearer " + authentik_api_key}
+    resp = requests.get(url, headers=headers)
+    json_object = json.loads(resp._content)
+    return(json_object['results'])
+
 def listmonk_create_subscriber(email, username, status):
     url = listmonk_api_url + '/subscribers'
     payload = {"email": email, "name": username, "status": status, "preconfirm_subscriptions": True}
@@ -87,15 +101,14 @@ def listmonk_get_list(list):
 # ensure that groups exist as lists
 for group_info in authentik_get_groups():
     try:
-        list_info = listmonk_get_list(group_info['name'])
+        list_info = listmonk_get_list('group-' + group_info['name'])
 
     except Exception as e:
-        print('> Failed to find group as list, creating ' + group_info['name'])
-        create_resp = listmonk_create_list(group_info['name'])
+        print('> Failed to find group as list, creating group-' + group_info['name'])
+        create_resp = listmonk_create_list('group-' + group_info['name'])
         print(create_resp)
         continue
 
-
 # ensure that users are synced
 for user_info in authentik_get_users():
     print('>>> Checking user ' + user_info['username'])
@@ -109,6 +122,7 @@ for user_info in authentik_get_users():
         subscriber_info = listmonk_get_subscriber(user_info['username'])
         if debug:
             print(subscriber_info)
+            print(user_info)
     
     # if get user info fails, assume that we have to create a new one
     # TOOD: only create if the error is indeed user-existence related
@@ -137,7 +151,7 @@ for user_info in authentik_get_users():
     # matches groups to list_id
     groups_id = []
     for group_info in user_info['groups_obj']:
-        list_info = listmonk_get_list(group_info['name'])
+        list_info = listmonk_get_list('group-' + group_info['name'])
         groups_id.append(list_info['id'])
 
     # checks if groups_id is in list of actual lists_id
@@ -155,3 +169,17 @@ for user_info in authentik_get_users():
         if id not in groups_id:
             print('> User groups check failed, updating')
             set_resp = listmonk_set_list([subscriber_info['id']], "remove", [id], status="")
+
+# sync used_by with users
+for app_info in authentik_get_apps():
+    try:
+        list_info = listmonk_get_list('app-' + app_info['slug'])
+
+    except Exception as e:
+        print('> Failed to find app as list, creating app-' + app_info['slug'])
+        create_resp = listmonk_create_list('app-' + app_info['slug'])
+        print(create_resp)
+        continue
+
+    for used_by in authentik_get_app_used_by(app_info['slug']):
+        print(used_by)