Auth tests

[jonthegeek]

Summary

As a maintainer of an API-wrapping package, in order to fully test my package at a file level, I would like a test file corresponding to the auth R file

Details

Add a template with tests for auth, and fill it with tests corresponding to the package auth functions. The first test will be pure boilerplate (other than the package abbreviation and MAYBE mocks), and then each specific auth functions should have a test.