Users registered in the app are not transferred from one controller to another. This is because controller ref 5193 has two databases: one on the controller itself and another database in the cloud that is linked to the controller's registration number. From your own APP, you can have several Wi-Fi controllers, each of which will have its users linked in the cloud. If, due to a fault or expansion, you want to transfer users from the cloud to another controller, this is not permitted, as if you change the controller, you will lose the Tuya APP database, since this database is linked to the controller's registration number.