Security/UserChecker.php
public function checkPreAuth(UserInterface $user) {
		
		if (!$user->isAccountDeleted()) {
			$ex = new UsernameNotFoundException('User account is deleted.');
			$ex->setUsername($user->getUsername());
			throw $ex;
		}
		
		parent::checkPreAuth($user);
	}
public function checkPreAuth(UserInterface $user) {
		
		if (!$user->isAccountDeleted()) {
			$ex = new UsernameNotFoundException('User account is deleted.');
			$ex->setUsername($user->getUsername());
			throw $ex;
		}
		
		parent::checkPreAuth($user);
	}
{@inheritdoc}