It’s true that authZ requires a lot of customization. In my experience, though, authN is the harder one to implement when there is no existing infra to support

It’s true that authZ requires a lot of customization. In my experience, though, authN is the harder one to implement when there is no existing infra to support it. How do we store and distribute credentials? How do we allow user-defined identities? How do we implement session keys? How do we scale out the authN layer? If we decide to use certs for authN, how do we manage certs lifecycle? The list is long.