Get Product by External Identifier

curl --request GET \
  --url https://api.sandbox.usenash.com/v1/product/external_identifier/{externalIdentifier}

{
  "id": "<string>",
  "externalid": "<string>",
  "name": "<string>",
  "description": "<string>",
  "imageurls": [
    "<string>"
  ],
  "categories": [
    "<string>"
  ],
  "weight": 123,
  "dimensions": {
    "depth": 123,
    "width": 123,
    "height": 123
  },
  "identifiers": [
    {
      "type": "<string>",
      "value": "<string>"
    }
  ],
  "attributes": [
    "<string>"
  ]
}