OnePlus
Delete a User Account auf OnePlus
OnePlus phones let one owner or administrator manage several user accounts on the same device. Each account keeps its own apps, files and settings separate from the others.
Deleting a user account is permanent. Every app, photo, message and setting saved under that profile is erased immediately and cannot be recovered afterward, so back up anything important first.
Only the device owner or an account with administrator rights can remove another user. A regular user cannot delete their own profile or anyone else's.
Steps to remove a user
Go to Open the Settings ➔ Tap on System ➔ Tap on Multiple users. Select the profile you want to remove, then Open the Settings for that user.
Tap on Tap on Delete user and confirm the warning with Confirm with Delete. The account disappears from the user list right away, along with all its data.
If you only want to block someone temporarily instead of erasing their data, disabling the profile or restricting app access is a better option than deletion.