curl -X POST "https://merchant-api.rmz.gg/shawarma/subscriptions/501/cancel" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"effective": "end_of_period"}'

const response = await fetch(
  "https://merchant-api.rmz.gg/shawarma/subscriptions/501/cancel",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer YOUR_API_TOKEN",
      "Content-Type": "application/json"
    },
    body: JSON.stringify({ effective: "end_of_period" })
  }
);
const result = await response.json();

import requests

response = requests.post(
    "https://merchant-api.rmz.gg/shawarma/subscriptions/501/cancel",
    headers={
        "Authorization": "Bearer YOUR_API_TOKEN",
        "Content-Type": "application/json"
    },
    json={"effective": "end_of_period"}
)
result = response.json()

$ch = curl_init("https://merchant-api.rmz.gg/shawarma/subscriptions/501/cancel");
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Authorization: Bearer YOUR_API_TOKEN",
    "Content-Type: application/json"
]);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(["effective" => "end_of_period"]));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = json_decode(curl_exec($ch), true);