fix bugs, full two fa system done

src/server/backend/credentials/2fa.js

@@ -14,6 +14,7 @@ const token = require( '../token.js' );
 class TwoFA {
     constructor () {
         this.tokenStore = {};
+        this.references = {};
     }
 
     registerStandardAuthentication () {
@@ -35,6 +36,14 @@ class TwoFA {
         return { 'code': code, 'token': tok };
     }
 
+    storeTokenReference ( token, sessionID ) {
+        this.references[ token ] = sessionID;
+    }
+
+    getTokenReference ( token ) {
+        return this.references[ token ];
+    }
+
     verifyEnhanced ( token, number = '' ) {
         if ( this.tokenStore[ token ]?.mode === 'standard' ) return true;
         else if ( this.tokenStore[ token ]?.mode === 'enhanced' ) {