Verify MD5

MD5 – The MD5 algorithm is a widely used hash function producing a 128-bit hash value. Although MD5 was initially designed to be used as a cryptographic hash function, it has been found to suffer from extensive vulnerabilities.

Usage:
Can verify your files the same exact from the source, maybe corrupted or not.
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Remove multi-user in Android

For non rooted phones only & usb debugging enabled
For rooted phones you can just edit /system/build.prop

Tools:
adb – md5: b02c8618b5426bd113e36d98131dfb88

Remove multi-user feature
fw.max_users=1 in build.prop

Hide Users from Settings
The location of build.prop is /system/build.prop
Open the file, go to the end,
create a new line and enter
fw.show_multiuserui=0
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