@wonderful-evening-57 does the code live in GitHub? if so, I’d recommend the 
free GH App as that’s much easier. But if you prefer Jenkins, then you can use that example - notice how it has 3 main sections:
1. 
setting up required env vars
2. 
PR workflow that posts comments
3. If you want to use Infracost Cloud, you’ll also need 
this section that uploads main branch runs so you can see all pre-existing issues in Infracost Cloud