how to add gamepad support in unity 2019

pls help I making a platformer and I need to add gamepad support so I was hoping someone could help

I recommend you implement Unity Input System:

-Documentation:
https://docs.unity3d.com/Packages/com.unity.inputsystem@1.0/manual/QuickStartGuide.html

-How to install:
https://docs.unity3d.com/Packages/com.unity.inputsystem@1.0/manual/Installation.html