TYPO3 v10 has reached end-of-life as of April 30th 2023 and is no longer being maintained. Use the version switcher on the top left of this page to select documentation for a supported version of TYPO3.

Need more time before upgrading? You can purchase Extended Long Term Support (ELTS) for TYPO3 v10 here: TYPO3 ELTS.


The auth key is used for configuration of authentication services. However, only a single and rarely used option is available currently:


Specifies a URL to redirect to after login is performed in the backend login form. This has been used in the past to redirect a backend user to the frontend to use frontend editing.