node.js - Cognito Developer Authenticated Identities with Node -

i'm trying create login system node backend/web service app, ios app. i'm trying use amazon cognito this, can't figure out how register/authenticate users either end. tutorials i've been able find use facebook login, don't me.

edit: have unauthenticated identities working somewhat, i'm still clueless authenticated developer identities.

while understand looking node sample, have full end-to-end sample java backend , ios , android clients.

the clients handle transition unauthenticated authenticated, linking multiple logins developer identity , more. fill gaps have. if not, please let know can improve.