Understanding Passport strategies

To offer its various authentication options, Passport uses separate modules that implement different authentication strategies. Each module provides a different authentication method, such as username/password authentication and OAuth authentication. So, in order to offer Passport-supported authentication, you'll need to install and configure the strategies modules that you'd like to use. Let's begin with the local authentication strategy.

Using Passport's local strategy

Passport's local strategy is a Node.js module that allows you to implement a username/password authentication mechanism. You'll need to install it like any other module and configure it to use your User Mongoose model. Let's begin by installing the local strategy module.

Installing Passport's local strategy module

To install Passport's local strategy module, you'll need to change your package.json file, as follows:

{
  "name": "MEAN",
  "version": "0.0.6",
  "dependencies": {
    "express":...