# Check your login credentials
The "auth operation denied" error typically occurs when your login credentials are incorrect. Double-check your username and password, ensuring there are no typos or extra spaces. If you recently changed your password, make sure you're using the new one.
If the problem persists, try clearing your browser cache or using incognito mode.
Source:
- [Troubleshooting incorrect username or password for Vapi login](
https://discord.com/channels/1211482211119796234/1336277538267201547)