--- a/mod_muc_http_auth/mod_muc_http_auth.lua	Mon Oct 25 15:58:16 2021 +0200
+++ b/mod_muc_http_auth/mod_muc_http_auth.lua	Mon Oct 25 16:47:44 2021 +0200
@@ -4,6 +4,7 @@
 local jid_node = require "util.jid".node;
 local jid_resource = require "util.jid".resource;
 local json = require "util.json";
+local set = require "util.set";
 local st = require "util.stanza";
 local urlencode = require "util.http".urlencode;
 local wait_for = require "util.async".wait_for;