add comment that local accounts are necessary to log in

diff --git a/includes/AuthPlugin.php b/includes/AuthPlugin.php
index 894b096..4f45f0f 100644 (file)
--- a/includes/AuthPlugin.php
+++ b/includes/AuthPlugin.php
@@ -72,6 +72,10 @@ class AuthPlugin {
         * when asked to login a user who doesn't exist locally but does in the
         * external auth database.
         *
+        * If you don't automatically create accounts, you must still create
+        * accounts in some way. It's not possible to authenticate without
+        * a local account.
+        *
         * This is just a question, and shouldn't perform any actions.
         *
         * @return bool