In search of Granblue Fantasy Versus files

[Sneakyerz]

The game runs of Unreal Engine 4.21, the hardest part is to find the AES key, I was told that I could find the AES Key with a hex editor and search for "AES":
"C:\Program Files (x86)\Steam\steamapps\common\Granblue Fantasy Versus\RED\Binaries\Win64"

But I'm new to AES key extracting and would help if anyone could help me with extract stuff from GBFV!