fix(auth): update user identification from userId to username in authentication middleware

Author: DanielJames0302

backend/collaboration-service/src/middleware/auth.js

@@ -23,7 +23,7 @@ export const authenticateWebSocket = async (req) => {
 
     return {
       success: true,
-      userId: decoded.userId,
+      userId: decoded.username,
     };
   } catch (err) {
     return {
@@ -62,7 +62,7 @@ export const authenticateHttp = async (req, res, next) => {
     const decoded = jwt.verify(token, process.env.JWT_SECRET);
 
     // Attach user ID to request
-    req.userId = decoded.userId;
+    req.userId = decoded.username;
 
     next();
   } catch (err) {

backend/matching-service/src/middleware/auth-socket.ts

@@ -8,7 +8,7 @@ interface AuthenticatedSocket extends Socket {
 }
 
 interface JWTPayload {
-  userId: string;
+  username: string;
   [key: string]: any;
 }
 
@@ -51,10 +51,10 @@ export const authenticateSocket = async (socket: Socket, next: (err?: Error) =>
     const decoded = jwt.verify(token, process.env.JWT_SECRET!) as JWTPayload;
 
     (socket as AuthenticatedSocket).data = {
-      userId: decoded.userId
+      userId: decoded.username
     };
 
-    console.log('Socket authenticated for userId:', decoded.userId);
+    console.log('Socket authenticated for userId:', decoded.username);
     next();
 
   } catch (err: any) {