Register and login a user with JWT token | Summary and Q&A

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November 22, 2022
by
Hitesh Choudhary
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Register and login a user with JWT token

TL;DR

Learn how to implement secure user authentication on the backend using Node.js, including encrypting passwords, generating tokens, and setting up cookies.

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Questions & Answers

Q: Why is the bcrypt.js package recommended for password encryption?

The bcrypt.js package offers a more abstract and easier implementation of password encryption compared to the built-in crypto module in Node.js. It provides better encryption layers and is widely used within the JavaScript developer community.

Q: What is the purpose of the cookie-parser package?

The cookie-parser package acts as a middleware in Node.js and allows easy access to user cookies. Once installed, it enables accessing the cookies sent by users in the request object, similar to accessing request.params or request.body.

Q: How can you retrieve and validate user data from the request body?

In the backend, user data can be extracted from the request.body object. To validate the data, you can destructure the required fields from the body object and perform checks to ensure all fields are present. If any field is missing, an appropriate response can be sent back to the user.

Q: How can you check if a user already exists in the database?

You can use Mongoose, an ODM (Object Data Modeling) library for MongoDB, to query the database and check if a user with a specific email already exists. By using the find one method, you can search the database for a user document matching the provided email.

Q: Why is it important to encrypt passwords before storing them in the database?

Encrypting passwords adds an additional layer of security. By encrypting passwords, even if an attacker gains access to the database, they will only see the encrypted version of the password, making it nearly impossible to retrieve the original password.

Summary & Key Takeaways

  • The video covers the process of implementing user authentication on the backend using Node.js.

  • It starts by discussing encryption and introduces the bcrypt.js package as a popular choice for password encryption.

  • Next, the video introduces the cookie-parser package, which allows easy access to user cookies in the backend.

  • The video then explains how to handle user input and performs validation checks to ensure all required fields are present.

  • The process of checking if a user already exists in the database is explained, along with querying the database using Mongoose.

  • The video also covers encrypting passwords and using the bcrypt.js package for that purpose.

  • Finally, the video demonstrates how to generate a token using the jsonwebtoken package and send it as a cookie in the response.

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