const response = await fetch('https://service.pcibooking.net/api/resources/stylesheet', {
  headers: {
    'Authorization': 'APIKEY your-api-key'
  }
});

const cssRecords = await response.json();
console.log(cssRecords);

import requests

response = requests.get(
    'https://service.pcibooking.net/api/resources/stylesheet',
    headers={
        'Authorization': 'APIKEY your-api-key'
    }
)

css_records = response.json()
print(css_records)

[
  {
    "ResourceName": "DefaultCSS",
    "Description": "The default CSS",
    "IsDefault": true,
    "ContentType": "text/css"
  },
  {
    "ResourceName": "ArabicCSS",
    "Description": "CSS for Arabic pages",
    "IsDefault": false,
    "ContentType": "text/css"
  }
]

{
    "code": -1003,
    "message": "Not authorized to access this resource",
    "moreInfo": "Bad or missing authorization data, expected APIKEY",
    "errorList": null
}