curl --request GET \
  --url https://api.maalbar.dk/v1/customer \
  --header 'X-Api-Key: <api-key>'

const url = 'https://api.maalbar.dk/v1/customer';
const options = {method: 'GET', headers: {'X-Api-Key': '<api-key>'}};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

{
  "publicId": "customer_xxxxxxxxxxxx",
  "name": "<string>",
  "website": "<string>",
  "address": "<string>",
  "zip": "<string>",
  "city": "<string>",
  "country": "<string>",
  "turnover": 123,
  "turnoverYear": "<string>",
  "turnoverCurrency": "<string>",
  "vat": "<string>"
}

{
  "error": "Invalid request parameters"
}

{
  "error": "Authentication required"
}

{
  "error": "Resource not found"
}

{
  "error": "An unexpected error occurred"
}