Deprecation: #100278 - PostLoginFailureProcessing hook¶
which can be used to handle custom notifications that a login in a frontend or
backend context failed, has been marked as deprecated.
If the hook is registered in a TYPO3 installation, a PHP
error is triggered.
The extension scanner also detects any usage of the deprecated interface as a strong match, and the definition of the hook as a weak match.
TYPO3 installations with custom extensions using this hook.
Migrate to the newly introduced PSR-14 event \TYPO3\CMS\Core\Authentication\Event\LoginAttemptFailedEvent.