migrate to "export default"

also, set no-use-before-define in linter

src/externalldap.js

@@ -2,34 +2,19 @@ import assert from 'node:assert';
 import AuditSource from './auditsource.js';
 import BoxError from './boxerror.js';
 import constants from './constants.js';
-import * as cron from './cron.js';
+import cron from './cron.js';
 import debugModule from 'debug';
 import eventlog from './eventlog.js';
-import * as groups from './groups.js';
+import groups from './groups.js';
 import ldap from 'ldapjs';
 import safe from 'safetydance';
-import * as settings from './settings.js';
+import settings from './settings.js';
 import tasks from './tasks.js';
-import * as users from './users.js';
+import users from './users.js';
 import util from 'node:util';
 
 const debug = debugModule('box:externalldap');
 
-export {
-    getConfig,
-    setConfig,
-
-    verifyPassword,
-    maybeCreateUser,
-
-    supports2FA,
-
-    startSyncer,
-
-    removePrivateFields,
-
-    sync
-};
 
 function removePrivateFields(ldapConfig) {
     assert.strictEqual(typeof ldapConfig, 'object');
@@ -545,3 +530,18 @@ async function sync(progressCallback) {
     debug('sync: done');
 }
 
+export default {
+    getConfig,
+    setConfig,
+
+    verifyPassword,
+    maybeCreateUser,
+
+    supports2FA,
+
+    startSyncer,
+
+    removePrivateFields,
+
+    sync
+};