# invalid_code (/docs/reference/errors/invalid_code)

The provided authentication code is invalid or expired.



This error occurs when the authentication code is invalid, expired, or cannot be verified.

## How to fix [#how-to-fix]

* Restart the authentication flow to generate a new code
* Ensure the code is used only once and within its valid time window
* Verify that the correct code is being sent to the callback endpoint