// jSON URL which should be requested
    $json_url = 'https://secure.cashflows.com/gateway/remote';

    $username = '5949138';  // authentication
    $password = 'Ad368w9XYw';  // authentication

    // jSON String for request
    $json_string = [
        'amount' => 'amount',
        'currency' => 'currency',
    ];

    // Initializing curl
    $ch = curl_init( $json_url );

    // Configuring curl options
    $options = array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_USERPWD => $username . ':' . $password,  // authentication
    CURLOPT_HTTPHEADER => array('Content-type: application/json') ,
    CURLOPT_POSTFIELDS => $json_string,
);

    // Setting curl options
    curl_setopt($ch, CURLOPT_ENCODING, 'UTF-8');
    curl_setopt_array( $ch, $options );

    // Getting results
    $result = curl_exec($ch); // Getting jSON result string

    return $result;