curl --request GET \
  --url https://api.creem.io/v1/customers/list \
  --header 'x-api-key: <x-api-key>'

{
  "items": [
    {
      "id": "<string>",
      "mode": "test",
      "object": "<string>",
      "email": "user@example.com",
      "name": "John Doe",
      "country": "US",
      "created_at": "2023-01-01T00:00:00Z",
      "updated_at": "2023-01-01T00:00:00Z"
    }
  ],
  "pagination": {
    "total_records": 0,
    "total_pages": 0,
    "current_page": 1,
    "next_page": 2,
    "prev_page": null
  }
}