Add LDAP auth module (#6226)

src/Adapters/Auth/index.js

@@ -23,6 +23,7 @@ const weibo = require('./weibo');
 const oauth2 = require('./oauth2');
 const phantauth = require('./phantauth');
 const microsoft = require('./microsoft');
+const ldap = require('./ldap');
 
 const anonymous = {
   validateAuthData: () => {
@@ -57,6 +58,7 @@ const providers = {
   weibo,
   phantauth,
   microsoft,
+  ldap,
 };
 
 function authDataValidator(adapter, appIds, options) {