curl --request GET \
  --url https://api.trysnapit.com/api/v1/credits/balance \
  --header 'Authorization: <api-key>'

const options = {method: 'GET', headers: {Authorization: '<api-key>'}};

fetch('https://api.trysnapit.com/api/v1/credits/balance', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.trysnapit.com/api/v1/credits/balance"

headers = {"Authorization": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

{
  "balance": 42,
  "creditCostPerInvoice": 1
}

{
  "statusCode": 401,
  "message": "Invalid or missing API key",
  "error": "Unauthorized"
}