src/Client/ApiClient.php
public function unsignedCall(string $method, array $params = [], string $requestMethod = 'GET'): array
    {
        // Call parameter
        $callParameter = [
            'method'  => $method,
            'api_key' => $this->apiKey,
        ];

        $params = array_merge($callParameter, $params);
        $params = $this->filterNull($params);
        $params = $this->encodeUTF8($params);

        return $this->call($method, $params);
    }
public function unsignedCall(string $method, array $params = [], string $requestMethod = 'GET'): array
    {
        // Call parameter
        $callParameter = [
            'method'  => $method,
            'api_key' => $this->apiKey,
        ];

        $params = array_merge($callParameter, $params);
        $params = $this->filterNull($params);
        $params = $this->encodeUTF8($params);

        return $this->call($method, $params);
    }
{@inheritdoc}