The easiest way to install the whawty.auth app is by installing one of the packages. For example, Debian packages can be found in the spreadspace APT Repository.
You can install & build the latest development version using go get:
go get github.com/whawty/auth/cmd/whawty-auth
You can run the app like this (assuming you also donwloaded ../../contrib/sample-config.yml
./bin/app --store ./sample-config.yaml run --web-addr :4242
For up to date usage instructions, call the app's binary with the --help flag.
Next, you need to create a store, for example by using ../../contrib/init-store.sh.