Passport.js

PassportJS is a javascript framework/middleware designed to assist with authentication/authorization mechanisms in your platform - passportjs.org

Paasport.js is a fully open source library created in 2012 and maintained by Auth0 - auth0.com

It is still maintained but new development has moved (Sept 2020) to the simpler and more open OpenID Connect compatible SDK - auth0.com

One of the ways you can use it is along with an oAuth flow. An other would be to use it only with JWTs. A third way could be to use it alongside simple "cookies".

Similarly you can either use oAuth, JWTs, simple cookies, or anything else that you want to use as authentication / authorization for your application, and passportJS can make it easier for you by handling some stuff, regardless of which "strategy" you choose to implement for your app.

There is an Auth0 authentication strategy for Passport.js. Passport is authentication middleware for Node.js that can be unobtrusively dropped into any Express-based web application - passportjs.org

There is a comprehensive tutorial on how to how to secure Node.js web application built with the Express framework using Auth0 and passport.js over on the Auth0 blog - auth0.com

There is also a Management API. See the Node Auth0 SDK - github .