curl --request GET \
  --url https://api.aichs365.com/api/v1/account \
  --header 'X-Legacy-Token: <api-key>'

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

fetch('https://api.aichs365.com/api/v1/account', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.aichs365.com/api/v1/account"

headers = {"X-Legacy-Token": "<api-key>"}

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

print(response.text)