I want to programmatically log in a user with a custom controller. I want to pass my data with $_POST to the route (I pass data from a mobile application); if username and password are correct, the method/function should return TRUE.

The route is the following one.

tcdev.login:
  path: '/tclogin'
  defaults:
    _controller: 'Drupal\tcdev\Controller\MYCenterController::login'
    _title: 'Login call back'
  requirements:
    _permission: 'access content'

The code for the controller is the following one.

namespace  Drupal\tcdev\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\DependencyInjection\ContainerInterface;

class MyController extends ControllerBase {

    /**
     * \Drupal\user\UserAuth definition.
     *
     * @var \Drupal\user\UserAuth
     */
    protected $userAuth;

    /**
     * {@inheritdoc}
     */
    public function __construct(UserAuth $user_auth) {
        $this->userAuth = $user_auth;
    }

    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('user.auth'));
    }
    }

    public function login() {
        $uid = $this->userAuth->authenticate($_POST['user'], $_POST['pass']);
        $acc = User::load($uid);

        //return new Response('Hi ' . $uid);
    }

}

It returns me the following error:

TypeError: Argument 1 passed to Drupal\tcdev\Controller\MyController::__construct() must be an instance of Drupal\tcdev\Controller\UserAuth, instance of Drupal\user\UserAuth given, called in /Users/yms/Sites/devdesktop/gttc/modules/tcdev/src/Controller/MyController.php on line 32 in Drupal\tcdev\Controller\MyController::__construct() (line 23 of modules/tcdev/src/Controller/MyController.php)

Where is my mistake?