Accesing variable DefaultGame.ini

Im using Rama’s Gamepad UMG plugin. it works great. It allows to use the gamepad as mouse. It also has a menu to set its setting.

However i want to be able to change them ingame. I did find the variables i need to change in the DefaultGame.ini file. Im not verry experienced in Unreal/ programming , i have no idea how to acces this variable and save it. I tryed get console variable, but i think it looks in diferend ini file