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One of the great things about using Passport.js is that a lot of the heavy lifting is taken care of by the module. In order to use it, we need to configure it and implement cookies and sessions for persistent logins.

To start using the traditional authentication module, we install the passport and the passport-local packages via the terminal:

npm install passport passport-local

Once imported, we require the passport and passport-local packages in our JavaScript file:

const passport = require("passport"); const LocalStrategy = require("passport-local").Strategy;

We’re importing the passport-local package with its Strategy instance to authenticate users with a username and password.

Now that we have the package installed, we can initialize it by calling the initialize() method:

app.use(passport.initialize());

passport is a middleware and must be implemented using app.use(). The initialize() method initializes the authentication module across our app.

Next, we want to allow for persistent logins, and we can do this by calling session() on our passport module:

app.use(passport.session());

The session() middleware alters the request object and is able to attach a ‘user’ value that can be retrieved from the session id.

Instructions

1.

Import the passport library and store it in a const variable called passport at the top of the app.js file.

Type node app.js into the Terminal to start the node app.

Press the Check Work button to check your work for each checkpoint.

2.

Import the passport-local library with its Strategy module and store it in a const variable called LocalStrategy.

3.

Add the middleware necessary to initialize the passport library.

4.

Add the middleware to implement a session with passport.

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