Lets initialise an express app that we will use to generate an authenticated backend today.

• Initialise an empty Node.js project
• Create an index.js file, open the project in visual studio code
• Add express as a dependency
• Create two new POST routes, one for signing up and one for signing in
• Use express.json as a middleware to parse the post request body
• Create an in memory variable called users where you store the username , password and a token (we will come to where this token is created later.
• Complete the signup endpoint to store user information in the in memory variable
• Create a function called generateToken that generates a random string for you
• Finish the signin endpoint. It should generate a token for the user and put it in the in memory variable for that user

<aside> 💡

This can be improved further by

1. Adding zod for input validation
2. Making sure the same user cant sign up twice
3. Persisting data so it stays even if the process crashes We’ll be covering all of this eventually

</aside>