curl --request POST \
  --url https://www.closient.com/products/api/v1/import/csv \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-Key: <api-key>' \
  --form file='@example-file'

{
  "total_rows": 123,
  "created": 123,
  "updated": 123,
  "skipped": 123,
  "error_count": 123,
  "errors": [
    {
      "line": 123,
      "message": "<string>",
      "column": "<string>"
    }
  ]
}