Git Submodules and how they live on Github

I've been working through the OAuth/Omni Auth Tutorial and was curious what would be a good way to set it up for github?

Would it make sense to have a seperate repo for each app (provider, client, etc.)?

Would i have a repo for the main folder which houses submodules (which to my understanding are just linked repos?

Let me know if I am understanding/thinking about this in a productive way. 😀