diff --git a/plexpy/logger.py b/plexpy/logger.py
index dd2e581a..cf7fb294 100644
--- a/plexpy/logger.py
+++ b/plexpy/logger.py
@@ -123,7 +123,12 @@ class UsernameFilter(logging.Filter):
         if not plexpy.CONFIG.LOG_BLACKLIST_USERNAMES:
             return True
 
-        for item in users.Users().get_users():
+        if not plexpy._INITIALIZED:
+            return True
+
+        items = users.Users().get_users() or []
+
+        for item in items:
             username = item['username']
             friendly_name = item['friendly_name']