Node.js, MongoDB, and AngularJS Web Development

Adding Authentication Strategies

Once the passport NPM is installed, you need to define which authentication strategies you want to implement. Authentication strategies are source specific—so Passport provides separate authentication strategies for Google, Facebook, Twitter, etc.

Each authentication strategy comes packaged in its own NPM prefixed with passport-. This keeps your code base small and makes it easy to implement multiple strategies. For example, the following commands install the Google, Facebook, and Twitter NPMs:

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npm install passport-google-google@0.3.0npm-install passport-facebook-facebook@1.0.3npm-install passport-twitter@1.0.2

Now you need to use require() to load a strategy before you can use it ...