I can't seem to find the integration document for Godot, please help?
Viewing post in Backtrace and Godot
The GitHub repository has a Godot module that you need to compile Godot 3 with in order to run. The Wiki on the repo has a step-by-step guide on what steps are needed to get the module working and integrated into a Godot project.
I also precompiled builds for a developer on this GitHub issue, so if you are on Windows you can download and use those builds.