Having issues with the GameJolt API to GDevelop

I wanted to add the GameJolt api to my game, So I used this (outdated, admittedly) (GDevelop GJ Extensions on GameJolt) to add GameJolt api for my game. But it seem like it’s doesn’t work as much as I wanted & it’s also hard to understand.

Especially these, They’re hard or kinda hard to understand:

I ended up removing the extension from my game. Is there something easier I can do to add GameJolt api to my game or Is there any plans for GameJolt api for GDevelop?