loginToAdminUserById.php

<?php
if (defined('STDIN')) {
    $_GET['user'] = $argv[1];
    // sudo -u www-data --  php pub/autologin.php "Lennon ava"
}
header('Pragma: no-cache');
header('Cache-Control: private, no-cache, no-store, max-age=0, must-revalidate, proxy-revalidate');
header('Expires: Tue, 04 Sep 2012 05:32:29 GMT');

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
ini_set('memory_limit', '5G');
error_reporting(E_ALL);
set_time_limit(0);

use Magento\Backend\Setup\ConfigOptionsList as BackendConfigOptionsList;
use Magento\Framework\App\Bootstrap;

require dirname(realpath(__FILE__)) . '/../app/bootstrap.php';

class TestApp
    extends \Magento\Framework\App\Http
    implements \Magento\Framework\AppInterface
{
    public function __construct(
        \Magento\Framework\ObjectManagerInterface $objectManager
    )
    {
        $this->_objectManager = $objectManager;
        $this->_eventManager = $this->_objectManager->get('Magento\Framework\Event\Manager');
        $this->_areaList = $this->_objectManager->get('Magento\Framework\App\AreaList');
        $this->_request = $this->_objectManager->get('Magento\Framework\App\Request\Http');
        $this->_response = $this->_objectManager->get('Magento\Framework\App\Response\Http');
        $this->_configLoader = $this->_objectManager->get('Magento\Framework\ObjectManager\ConfigLoaderInterface');
        $this->_state = $this->_objectManager->get('Magento\Framework\App\State');
        $this->_filesystem = $this->_objectManager->get('Magento\Framework\Filesystem');
        $this->registry = $this->_objectManager->get('\Magento\Framework\Registry');

        parent::__construct($objectManager, $this->_eventManager, $this->_areaList, $this->_request, $this->_response, $this->_configLoader, $this->_state, $this->registry);
    }

    public function launch()
    {
        $areaCode = 'adminhtml';
        $username = $_GET['user'] ?? 'satish';

        $this->_request->setPathInfo('/admin');
        $this->_state->setAreaCode($areaCode);
        $this->_objectManager->configure($this->_configLoader->load($areaCode));

        /** @var \Magento\User\Model\User $user */
        $user = $this->_objectManager->get('Magento\User\Model\User')->loadByUsername($username);

        $userActiveSession = $this->_objectManager->get(\Magento\Security\Model\AdminSessionInfo::class)->getCollection();
        $userActiveSession
            ->addFieldToFilter('user_id', $user->getId())
            ->addFieldToFilter('status', 1);
        $userActiveSession->getSelect()
            ->order('created_at desc')
            ->limit(1)
            ->reset('columns')
            ->columns('session_id');
        $activeSessionId = $userActiveSession->getConnection()->fetchOne($userActiveSession->getSelect());
        $activeSessionId = '';
        $sessionName = 'admin';
        $backendUrl = $this->_objectManager->get('Magento\Backend\Model\UrlInterface');
        if (!$activeSessionId) {
            /** @var \Magento\Backend\Model\Auth\Session $session */
            $session = $this->_objectManager->get(\Magento\Backend\Model\Auth\Session::class);
            $session->setUser($user);
            $session->processLogin();
            // $this->sessionsManager->processLogin();
            $sessionsManager = $this->_objectManager->get(\Magento\Security\Model\AdminSessionsManager::class);
            $sessionsManager->processLogin();
            if ($session->isLoggedIn()) {
                $activeSessionId = $session->getSessionId();
                $sessionName = $session->getName();
            }

            /** @var \Magento\Backend\Model\UrlInterface $backendUrl */

            $path = $backendUrl->getStartupPageUrl();
        } else {
            $deploymentConfig = $this->_objectManager->get('\Magento\Framework\App\DeploymentConfig');
            $path = $deploymentConfig->get(BackendConfigOptionsList::CONFIG_PATH_BACKEND_FRONTNAME);
        }
        if ($activeSessionId) {
            $cookieManager = $this->_objectManager->get('Magento\Framework\Stdlib\CookieManagerInterface');
            $cookieValue = $activeSessionId;
            if ($cookieValue) {
                $sessionConfig = $this->_objectManager->get('Magento\Backend\Model\Session\AdminConfig');
                $cookiePath = str_replace('autologin.php', 'index.php', $sessionConfig->getCookiePath());
                $cookieMetadata = $this->_objectManager->get('Magento\Framework\Stdlib\Cookie\CookieMetadataFactory')
                    ->createPublicCookieMetadata()
                    ->setDuration(3600)
                    ->setPath($cookiePath)
                    ->setDomain($sessionConfig->getCookieDomain())
                    ->setSecure($sessionConfig->getCookieSecure())
                    ->setHttpOnly($sessionConfig->getCookieHttpOnly());
                $cookieManager->setPublicCookie($sessionName, $cookieValue, $cookieMetadata);
                $date = new DateTime("now");
                $date->modify('+1 day');
                echo "\n";
                echo 'document.cookie ="' . $sessionName . '=' . $cookieValue . '; expires=' . $date->format('Y-m-dTH:i:sZ') . '; path=' . $cookiePath . '; domain=' . $sessionConfig->getCookieDomain() . '; "';
                echo "\n";
                echo "<br>";
                echo "\n";

            }
            $url = $backendUrl->getUrl($path);
            $url = str_replace('autologin.php', 'index.php', $url);
            echo "\n";
            echo "<a href='" . $url . "' target='_blank'>Click here</a>";
            echo "\n";
            die;
            header('Location:  ' . $url);
            exit;
        }
        return $this->_response;
    }
}

$bootstrap = Bootstrap::create(BP, $_SERVER);
$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
/** @var \Magento\Framework\App\Http $app */
$app = $bootstrap->createApplication('TestApp');
$bootstrap->run($app);

?>