App\Model\UserManager::authenticate PHP Méthode

    public function authenticate(array $credentials)
    {
        list($username, $password) = $credentials;
        $row = $this->database->table(self::TABLE_NAME)->where(self::COLUMN_NAME, $username)->fetch();
        if (!$row) {
            throw new Nette\Security\AuthenticationException('The username is incorrect.', self::IDENTITY_NOT_FOUND);
        } elseif (!Passwords::verify($password, $row[self::COLUMN_PASSWORD_HASH])) {
            throw new Nette\Security\AuthenticationException('The password is incorrect.', self::INVALID_CREDENTIAL);
        } elseif (Passwords::needsRehash($row[self::COLUMN_PASSWORD_HASH])) {
            $row->update([self::COLUMN_PASSWORD_HASH => Passwords::hash($password)]);
        }
        $arr = $row->toArray();
        unset($arr[self::COLUMN_PASSWORD_HASH]);
        return new Nette\Security\Identity($row[self::COLUMN_ID], $row[self::COLUMN_ROLE], $arr);
    }