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

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

import requests

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

print(response.json())

[
    "my-stripe-credentials",
    "my-adyen-credentials",
    "hotel-booking-gateway"
]

{
    "code": -125,
    "message": "Bad input data",
    "moreInfo": "...",
    "errorList": null
}