add README.md #3

README.md

@@ -24,6 +24,11 @@ This libary creates a settlement based on the provided transaction data.
 
 ## Example Usage
 ```php
+<?php 
+
+// Import class SingleSettlement
+require_once('./SingleSettlement.php');
+
 // Sample operator code
 $operatorCode = '0053';
 // Sample site code
@@ -46,3 +51,5 @@ if ($result['status']) {
 } else {
     echo "Failed to create settlement. Error: " . $result['message'];
 }
+
+?>
\ No newline at end of file