Config.php

public static function configure($token, $marketplace, $seller = null, $is_zend = null)
    {
        $auth = array('token' => $token);
        is_null($seller) ?: $auth += array('on_behalf_of' => $seller);

        $configurations = [
            'marketplace' => $marketplace,
            'gatway' => 'zoop',
            'base_url' => 'https://api.zoop.ws',
            'auth' => $auth,
            'configurations' => [
                'limit' => 20,
                'sort' => 'time-descending',
                'offset' => 0,
                'date_range' => null,
                'date_range[gt]' => null,
                'date_range[gte]' => null,
                'date_range[lt]'=> null,
                'date_range[lte]' => null,
                'reference_id'=> null,
                'status' => null,
                'payment_type' => null,
            ],
            'guzzle' => [
                'base_uri' => 'https://api.zoop.ws',
                'timeout' => 10,
                'headers' => [
                    'Authorization' => 'Basic ' . \base64_encode($token . ':')
                ]
            ]
        ];
        return self::ClientHelper($configurations, $is_zend);
    }