If you check the option in the nuki app (ios) to remember the admin password, which is the default to be checked, you have no chance to delete this password. If you want, that the devices, which remember the password, are not longer abled to autonomously login to the admin account, you have to change the admin password. If you change the admin password back to the old one the device is abled to login again without asking to put in the password.
I need the option to delete the automatic login for this device, so that the password is deleted.