[Backend] Implement Google OAuth

[rasouza]

Implement Google login for authentication between Mobile App and API

New URLs:

• GET /api/auth/google
• POST /api/auth/google/callback

Description

• Implement Google strategy in passport.js
• Add proper env vars for Google OAuth client config
• Implement JWT authentication

Motivation and Context

Mobile app needs to know which user is logged in so that it can save movies in watchlists and manage subscriptions

This PR implements a JWT auth system that can receive login from Google provider. Now that the auth system is in place, it's easy to add new providers by just implementing each Strategy

How Has This Been Tested?

• Unit tests
• Integration tests

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[mathiasberggren]

I feel like I'm swapping between yarn and npm, but I guess we're using npm now? 😃

[rasouza]

hahaha sorry I should have left a note here.. yarn was failing to capture the terminal session when using the REPL. For some reason, running this command specifically with npm works and I didn't want to put effort to investigate why and fix it.

We're definitely using yarn and you should still run yarn console

[rasouza]

Let's keep a proper ticket here :D #23