curl --request GET \
  --url https://api.chift.eu/consumers/{consumer_id}/commerce/customers/{customer_id}

{
  "id": "<string>",
  "source_ref": {
    "id": "<string>",
    "model": "<string>"
  },
  "first_name": "<string>",
  "last_name": "<string>",
  "phone": "<string>",
  "email": "<string>",
  "language": "<string>",
  "internal_notes": "<string>",
  "currency": "<string>",
  "addresses": [],
  "created_on": "2023-11-07T05:31:56Z"
}