How to enable/disable Dark Mod on MIUI 10.3 Stable ROM

[bugrevealingbme]

1- Download Google Messages 4.0.054 : https://www.apkmirror.com/apk/google-inc/messenger-google-inc/messenger-google-inc-4-0-054-release/messages-4-0-054-dragon_rc17_alldpi-arm64-v8a-phone-android-apk-download/download/
2- Open Google Messages and enable or disable Dark Mod