curl --request GET \
  --url https://api.example.com/api/customers \
  --header 'Authorization: Bearer <token>'

{
  "message": "Customers list retrieved successfully",
  "data": [
    {
      "id": 123,
      "CID": "<string>",
      "name": "<string>",
      "email": "<string>",
      "url": "<string>",
      "number_range_id": 123,
      "marketing_opt_in_at": "<string>"
    }
  ],
  "meta": {
    "current_page": 1,
    "last_page": 5,
    "per_page": 10,
    "total": 45
  }
}