api: fix PhpStorm warnings in UserDataPersisterTest
api: fix PhpStorm warnings in UserDataPersisterTest

Because of the type hint of the wrong variable.

pmattmann/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,ecamp/ecamp3,pmattmann/ecamp3,usu/ecamp3,usu/ecamp3,ecamp/ecamp3,usu/ecamp3,ecamp/ecamp3,usu/ecamp3,pmattmann/ecamp3