Update Passport authentication strategies

[Mano3009]

trafficstars

Imports necessary modules like Passport, axios, and OAuth strategies (Facebook, Google, Twitter, etc.). Defines functions to handle user sessions (serializeUser, deserializeUser). Creates a common function (handleService) to manage user authentication for different social platforms. Configures Passport strategies for various platforms (Facebook, Google, etc.), each using handleService to authenticate users. Implements error handling for existing user accounts and email conflicts.

[YasharF]

Reopening; I need to look more into the options for the refactoring.