+local is_admin = require "core.usermanager".is_admin;
+local jid_split = require "util.jid".split;
+local jid_bare = require "util.jid".bare;
+local b64_decode = require "util.encodings".base64.decode;
+local get_method = require "core.objectmanager".get_object;
+local validate_credentials = require "core.usermanager".validate_credentials;