I believe RIO stands for: "ReaderT <something-something> IO", which is a nod to
the top-level application data type:
```haskell
-- This is a simplification
newtype RIO env a = RIO { runRIO :: ReaderT env a () }
```
I read about RIO from an FP-Complete blog post a few months ago, and now I'm
excited to try it out for a real project. Bon voyage!
I'd like to see if I can avoid using `cabal` and `stack` and build and deploy
this application using `nix-shell` and `nix-build` only. Let's see how that
goes.
The JWT should match "accounts.google.com" or "https://accounts.google.com". If
it doesn't, we produce a validation error.
TL;DR:
- Group all failed stringOrURI function calls as StringOrURIParseFailure errors
I'm attempting to be an obedient boy and implement this and future features
using TDD.
TL;DR:
- Defined a few tests
- Defined an empty GoogleSignIn module
- Defined a Fixtures module to quickly create JWTs to test
