curl --request GET \
  --url https://api.amberflow.io/v1/customers \
  --header 'X-API-Key: <api-key>'

{
  "data": [
    {
      "id": "cus_mtONwIvCywLadgOu",
      "created_at": "2024-09-23T12:00:00.000Z",
      "name": "John Doe",
      "email": "john@example.com",
      "language": "en-US",
      "group_id": "grp_0JezsPIPQ5rCQpjP"
    }
  ]
}