snippet 1 from https://github.com/ssi-anik/laravel-custom-auth for medium article - https://medium.com/@sirajul.anik/laravel-api-authenticate-user-with-custom-driver-different-table-using-auth-middleware-fa2cabec2d61

AuthServiceProvider.php

<?php

namespace App\Providers;

use App\Extensions\AccessTokenGuard;
use App\Extensions\TokenToUserProvider;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Auth;

class AuthServiceProvider extends ServiceProvider
{
	/**
	 * The policy mappings for the application.
	 * @var array
	 */
	protected $policies = [
		'App\Model' => 'App\Policies\ModelPolicy',
	];

	/**
	 * Register any authentication / authorization services.
	 * @return void
	 */
	public function boot () {
		$this->registerPolicies();

		Auth::extend('access_token', function ($app, $name, array $config) {
			// automatically build the DI, put it as reference
			$userProvider = app(TokenToUserProvider::class);
			$request = app('request');

			return new AccessTokenGuard($userProvider, $request, $config);
		});
	}
}