Updated 2021 MERN stack user authentication tutorial series. In this tutorial series, I'm setting up a project template for working with user authentication in the MERN stack. You will learn to register user accounts to a MongoDB database, log in users on the react frontend and verify logged in users. The authentication is secured by technologies such as JsonWebTokens, Bcrypt and HTTP-only cookies. We'll be using react hooks and the context API to deal with the state management of the user authentication in the frontend. MERN stack complete course: https://www.udemy.com/course/mern-stack-complete-full-stack-apps-from-scratch/?referralCode=3CF0931F54A6CB83B1A5 Insomnia API tester: https://insomnia.rest/ Finished code on github: https://github.com/jgbijlsma/mern-auth-template-tutorial Chapters 00:00 Fixing cookies not saving