public function get(string $key): string
    {
        if (!$this->users_id) {
            throw new Exception('No users is set to save config');
        }

        if ($config = $this->findFirst(['conditions' => 'users_id = ?0 and name = ?1', 'bind' => [$this->users_id, $key]])) {
            return $config->value;
        }

        throw new Exception('No value found for key: ' . $key);
    }