Add ADManager import in example config

config.py.example

@@ -62,6 +62,7 @@ SESSION_PROTECTION = "strong" # do not change
 # authentication
 SECURITY_KEY = "some other random string" # change this
 AUTH_MAX_DURATION = 300
+from auth import LdapManager, ADManager
 AUTH_BACKENDS = [
     LdapManager(
         host="ldap.example.com",