How to create custom game user settings?

I was looking through GameUserSettings.ini on all Unreal Engine powered games i have on my pc, and i found out that they are using some kind of custom game user settings class. For instance, Dead By Daylight, UE powered game, the game user settings file contains this string

[/Script/DeadByDaylight.DBDGameUserSettings]

and settings, that does not exist in default GameUserSettings:

KillerCameraSensitivity=50
SurvivorCameraSensitivity=50
KillerMouseSensitivity=5
SurvivorMouseSensitivity=10
KillerControllerSensitivity=5
SurvivorControllerSensitivity=10
AimAssist=True