curl --request GET \
  --url https://api.mageloyalty.com/v1/customers/6789012345/birthday \
  --header 'Authorization: <api-key>'

curl --request GET \
  --url https://api.mageloyalty.com/v1/customers/jane@example.com/birthday \
  --header 'Authorization: <api-key>'

const response = await fetch(
  "https://api.mageloyalty.com/v1/customers/6789012345/birthday",
  {
    method: "GET",
    headers: { Authorization: "<api-key>" },
  }
);

const data = await response.json();

import requests

response = requests.get(
    "https://api.mageloyalty.com/v1/customers/6789012345/birthday",
    headers={"Authorization": "<api-key>"},
)

data = response.json()

<?php
$ch = curl_init("https://api.mageloyalty.com/v1/customers/6789012345/birthday");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["Authorization: <api-key>"],
]);
$data = json_decode(curl_exec($ch), true);

{
  "data": {
    "type": "customer_birthday",
    "id": "6789012345",
    "attributes": {
      "shopify_customer_id": "6789012345",
      "email": "jane@example.com",
      "date_of_birth": "1990-05-15T00:00:00.000Z"
    }
  }
}

{
  "data": {
    "type": "customer_birthday",
    "id": "6789012345",
    "attributes": {
      "shopify_customer_id": "6789012345",
      "email": "jane@example.com",
      "date_of_birth": null
    }
  }
}

{
  "errors": [
    {
      "status": "404",
      "title": "Not Found",
      "detail": "Customer '6789012345' not found"
    }
  ]
}