create a user scope access token flow

[Felipe-gsilva]

we will need to generate a access token and perhaps even update how we manage install id and the git api calls that only need user auth's, not the entire app installation

https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/generating-a-user-access-token-for-a-github-app#using-the-web-application-flow-to-generate-a-user-access-token