Login programmatically as a user

Thanks for this code, you save my day. It's working for me.

Sometimes we need to login into our Drupal site not through the regular login form. For example if we have trouble with login form or maybe we just forgot our password... Here are few ways to login into your Drupal site not through login form.

For Drupal 8 you just need to create file your_auto_login.php in the Drupal root directory, put there the next code and open this file in your browser:

<?php

use Drupal\Core\DrupalKernel;

use Symfony\Component\HttpFoundation\Request;

$autoloader = require_once 'autoload.php';

$kernel = new DrupalKernel('prod', $autoloader);

$request = Request::createFromGlobals();

$response = $kernel->handle($request);

// ID of the user.

$uid = THE_AUTOMATIC_USER_ID; //Do not use 1 because it is the super admin

$user = Drupal\user\Entity\User::load($uid);

user_login_finalize($user);

$response->send();

$kernel->terminate($request, $response);

You need to put index.php at root
$uid ='Your User ID Here';
$account = \Drupal\user\Entity\User::load($uid);
\Drupal::service('session')->migrate();
\Drupal::service('session')->set('uid', $account->id());
\Drupal::moduleHandler()->invokeAll('user_login', array($account));

or
$uid ='Your User ID Here';
$user = Drupal\user\Entity\User::load($uid);
user_login_finalize($user);

$response->send();