Issue #2560237 by bhanu951, smustgrave, _utsavsharma, ankithashetty, alexpott,...

use Drupal\Core\Language\Language;

use Drupal\Core\Url;

use Drupal\Tests\UpdatePathTestTrait;

use Drupal\user\Entity\User;

use Symfony\Component\DependencyInjection\Reference;

use Symfony\Component\HttpFoundation\Request;

   * Replace User 1 with the user created here.

   */

  protected function replaceUser1() {

    /** @var \Drupal\user\UserInterface $account */

    // @todo Saving the account before the update is problematic.

    //   https://www.drupal.org/node/2560237

    $account = User::load(1);

    $account->setPassword($this->rootUser->pass_raw);

    $account->setEmail($this->rootUser->getEmail());

    $account->setUsername($this->rootUser->getAccountName());

    $account->save();

    // We try not to save content entities in hook_update_N() because the schema

    // might be out of sync, or hook invocations might rely on other schemas

    // that also aren't updated yet. Hence we are directly updating the database

    // tables with the values.

    Database::getConnection()->update('users_field_data')

      ->fields([

        'name' => $this->rootUser->getAccountName(),

        'pass' => \Drupal::service('password')->hash($this->rootUser->pass_raw),

        'mail' => $this->rootUser->getEmail(),

      ])

      ->condition('uid', 1)

      ->execute();

  }

  /**