why we use socialite in laravel code example

Example 1: socialite laravel 7

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Laravel\Socialite\Facades\Socialite;

class LoginController extends Controller
{
    /**
     * Redirect the user to the GitHub authentication page.
     *
     * @return \Illuminate\Http\Response
     */
    public function redirectToProvider()
    {
        return Socialite::driver('github')->redirect();
    }

    /**
     * Obtain the user information from GitHub.
     *
     * @return \Illuminate\Http\Response
     */
    public function handleProviderCallback()
    {
        $user = Socialite::driver('github')->user();

        // $user->token;
    }
}

Example 2: socialite laravel 7

return Socialite::driver('github')
    ->setScopes(['read:user', 'public_repo'])
    ->redirect();