FEAT: Validate token using Firebase Admin

[haruelrovix]

Half-Closes (#94)

Description

Tested some endpoints only 🤞🏻

HTTP Requests
-------------

GET   /api/private/user/by-uuid/***                   200 OK
PATCH /api/private/user/update                        200 OK
POST  /api/private/user/slug-checker/***              200 OK
GET   /api/private/question/by-uid/pagination/***     200 OK

Current Tasks

• Verify Id Token
• Revoke Refresh Tokens on Session-Destroy ~It requires GOOGLE_APPLICATION_CREDENTIALS. Will be on separate PR.

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[mazipan]

Code wise, looks good.
But I will test this changes by my self later in my local since it's quite critical flow.

I may need more time.

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Name	Status	Preview	Comments	Updated (UTC)
tanyaaja	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 24, 2023 0:02am

[mazipan]

I have check this PR and it works like charm 🚀