Cotter allows you to log your users in and give them access to the appropriate resources. This tutorial also shows you how to build a Next.js app that only allows logged-in users to access private resources within the app.

This is super awesome. Flurly is built on nextjs and uses firebase but I haven't been the happiest of customers. Will look into switching to Cotter!

Very cool service, great looking site - thanks for the js tutorial. Will definitely keep Cotter in mind for our roadmap.