How to add Stadia to Source Code of Unreal 4. (Dev already in Stadia Program) , (UE4-26)

(UE 4-26)

Hello fellow coders!

I am making my first leap from Steam to Stadia and I am going through the process of rebuilding the Source Code for the first time.

I have already been approved by Stadia and have the code from Epic for Stadia. I am just not sure how to add it to Unreal.

Do any of you fine Devs have a tutorial I could follow?