implement fetch_pending()
diff --git a/planetstack/observer/steps/__init__.py b/planetstack/observer/steps/__init__.py
index 6d7adb8..7f5dcf9 100644
--- a/planetstack/observer/steps/__init__.py
+++ b/planetstack/observer/steps/__init__.py
@@ -8,3 +8,4 @@
 from .sync_sliver_ips import SyncSliverIps
 from .sync_slivers import SyncSlivers
 from .sync_users import SyncUsers
+from .garbage_collector import GarbageCollector