recipe is essentially a self contained auth module. For example: 1) sessions is its own module (recipe) 2) email verification is its own module (recipe) 3) email password is its own module (recipe) (it reuses 1 and 2) 4) third party is its own module (recipe) (it reuses 1 and 2) 5) third party email password is its own module (recipe) (it reuses 3 and 4)