Mode auth implementation into a module

[davidcheung]

this enables someone to spin up extra auth instances and steps towards decoupling the infra / application logic more

[bmonkman]

Looks like the zero create check failed. And when you figure out why we should see if we can add a guard around that case to give a better error message than a nil ptr dereference.

[davidcheung]

Yeah I wrote a zero of terraform-aws-zero that is not yet released yet, i wonder if thats the problem
not sure why it would fail at zero create, will dig deeper