Game Instance, Custom Game Instance For Inter-Level Persistent Data Storage

Hi Everybody!
i wanted game instance for inter-level persistence, so i came to Rama’s tutorial

now in this tutorial i have done SolusGameInstance.h and SolusGameInstance.cpp part without error, and i am not getting “PlayerController.cpp” part, the main problem is that iam new to unreal engine 4 so i dont know how to use “int32 InterLevelPersistentValue” and GetGameInstance(), into another AMyActor.cpp class and UMG. Now this AMyActor.cpp is connected to another level in which i record score and then forward that score to result level which is UMG based. Your help will be a huge step for me.
Sorry for any english mistakes…Thanks in advance!