Before you can use it, you need to:
This SDK can be installed using the Unity Package manager system (on Unity 2018.3+) with git. Alternatively, you can install the SDK using the traditional Unity packages.
/Packages/manifest.json
file in your Unity project folder"com.kau.fireball": "https://github.com/kauinc/fireball-unity-sdk.git#latest"
"com.kau.fireball": "https://github.com/kauinc/fireball-unity-sdk.git#1.0.0"
Alternatively, you can download and import the Fireball SDK in the traditional way by unity packages:
Assets > Import Package > Custom Package
Import