curl --request GET \
  --url https://api-sandbox.y.uno/v1/customers/{customer_id}

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "merchant_customer_id": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "<string>",
  "country": "<string>",
  "document": {
    "document_type": "DNI",
    "document_number": "<string>"
  },
  "phone": {
    "country_code": "+1",
    "number": "5550000001"
  },
  "billing_address": {
    "address_line_1": "<string>",
    "address_line_2": "<string>",
    "city": "<string>",
    "state": "<string>",
    "zip_code": "<string>",
    "country": "AR",
    "neighborhood": "<string>"
  },
  "metadata": [
    {
      "key": "<string>",
      "value": "<string>"
    }
  ],
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}