change Citycom OAN Api Helper updateService() to get only single service before update

lib/Citycom/OanApiClient.php

@@ -177,6 +177,33 @@ class Citycom_OanApiClient {
 
     }
 
+    public function getService($service_id) {
+        if(!$this->token) {
+            $this->getAuthToken();
+            if(!$this->token) {
+                return false;
+            }
+        }
+
+        //$url = $this->baseurl.CITYCOM_OAN_API_EP_GET_SERVICES;
+        $url = str_replace("{service_id}", $service_id, $this->baseurl.CITYCOM_OAN_API_EP_GET_SERVICE);
+
+        $ctx_options = [
+            "http" => [
+                "ignore_errors" => true,
+                "method" => "GET",
+                "header" => [
+                    "Accept: application/json",
+                    "Authorization: Bearer ".$this->token,
+                ],
+            ]
+        ];
+
+        $service = $this->runApiRequest($url, $ctx_options);
+        return $service;
+
+    }
+
     public function createService($data) {
         if(!$this->token) {
             $this->getAuthToken();