Configures authentication middleware.
Important options:
key
- secure key for hashing payload (if persistent key not provided, new key is generated with each server start - logging out all users)version
- should be increased with every change increateSession
function, so users using old structure are logged outcreateSession
- function returning data which identifies user (usually user id)getUserForSession
- function which checks if user exists/session is valid (data returned fromcreateSession
are supplied) and result is put intoctx.state.user