added discord functionality to extension and polished some of downloader process.

backend/app/api/credentials.py

@@ -172,11 +172,12 @@ async def verify_credentials():
 
         # TODO: Implement actual verification by making test request
         # For now, just mark as verified
-        credential.last_verified = datetime.utcnow()
+        verified_at = datetime.utcnow()
+        credential.last_verified = verified_at
         await session.commit()
 
         return jsonify({
             "platform": platform,
             "is_valid": True,
-            "last_verified": credential.last_verified.isoformat(),
+            "last_verified": verified_at.isoformat(),
         })