feat: get service account user

src/Client.php

@@ -338,4 +338,37 @@ public function getUsersInRole($client_id, $role_name, $params = array())
 
         return $result;
     }
+
+    public function getServiceAccountUser($client_id)
+    {
+        $curl = curl_init();
+
+        $query = '';
+        if (isset($params)) {
+            $query = http_build_query($params);
+        }
+
+        curl_setopt_array($curl, array(
+            CURLOPT_URL => "{$this->getAdminRealmUrl()}/clients/{$client_id}/service-account-user",
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_ENCODING => '',
+            CURLOPT_MAXREDIRS => 10,
+            CURLOPT_TIMEOUT => 0,
+            CURLOPT_FOLLOWLOCATION => true,
+            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
+            CURLOPT_CUSTOMREQUEST => 'GET',
+            CURLOPT_HTTPHEADER => array(
+                'Authorization: Bearer '.$this->getToken()
+            ),
+        ));
+
+        $response = curl_exec($curl);
+        $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+        curl_close($curl);
+
+        return array(
+            'data' => json_decode($response, true),
+            'code' => (int) $httpcode
+        );
+    }
 }