Cloud-based authentication and authorization platforms—sometimes known as IDaaS, or identity as a service — are an expanding area of cloud tooling, and it’s easy to see why. App security is difficult and error-prone, and virtually every project requires it. The ability to offload much of the work to a dedicated and proven service is enticing.

Auth0 is an up-and-coming provider of authentication and authorization services (and open source software). In this article, you will see how to incorporate Auth0 log-in capabilities into a app with a Node.js/Express back end, serving a straight JS front end, and then use the authenticated user info (via JWT) to show/hide UI information and secure RESTful endpoints.

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