Missing Class property from src/Controller/SwitchUserController.php

Problem/Motivation

protected $moduleHandler property is missing from src/Controller/SwitchUserController.php

Proposed resolution

add

  /**
   * The module handler service.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface
   */
  protected $moduleHandler;

at src/Controller/SwitchUserController.php