Updated Home (markdown)

Home.md

@@ -13,6 +13,11 @@ Run this sql query on your db:
         INNER JOIN room_memberships AS m USING (room_id, event_id)
         WHERE room_id = '!cURbafjkfsMDVwdRDQ:matrix.org' AND membership = 'join';
 
+What users are registered on my server?
+---
+
+    SELECT NAME from users;
+
 Manually resetting passwords:
 ---
 See https://github.com/matrix-org/synapse/blob/master/README.rst#password-reset