/**
* @param $username
* @return User|null
*/
private function findUser($username)
{
$criteria = array("username" => $username);
return $this->userRepository->findOneBy($criteria);
}
/**
* @param string $username
* @return User|null
*/
public function findByUsername($username)
{
$criteria = ["username" => $username];
return $this->userRepository->findOneBy($criteria);
}