/**
* @param string $username
* @throws \Symfony\Component\Security\Core\Exception\UsernameNotFoundException
* @return \Symfony\Component\Security\Core\User\UserInterface
*/
public function loadUserByUsername($username) : UserInterface
{
if (($user = $this->manager->findUserByUsernameOrEmail($username)) === null) {
throw new UsernameNotFoundException("Username \"{$username}\" does not exist.");
}
return $user;
}