code: protected function checkAccountStatus()
  	{
  		@trigger_error('Using User::checkAccountStatus() has been deprecated and will no longer work in Contao 5.0. Use Symfony security instead.', E_USER_DEPRECATED);
  
  		try
  		{
  			$userChecker = System::getContainer()->get('contao.security.user_checker');
  			$userChecker->checkPreAuth($this);
  			$userChecker->checkPostAuth($this);
  		}
  		catch (AuthenticationException $exception)
  		{
  			return false;
  		}
  
  		return true;
  	}
docs: Check the account status and return true if it is active
  
  @return boolean True if the account is active
  
  @deprecated Deprecated since Contao 4.5, to be removed in Contao 5.0.
  Use Symfony security instead.