Symfony 4 - URI must be a string or UriInterface - Guzzle - php

Question

When I try to make a request by PHP Guzzle 7 I am getting the ([2021-10-05 15:50:44] request.CRITICAL: Uncaught PHP Exception InvalidArgumentException: "A 'contents' key is required" at /home/allen/Documents/pim/pim-community-standard/vendor/guzzlehttp/psr7/src/MultipartStream.php line 86 {"exception":"[object] (InvalidArgumentException(code: 0): A 'contents' key is required at /home/allen/Documents/pim/pim-community-standard/vendor/guzzlehttp/psr7/src/MultipartStream.php:86)"} [])
I am trying you upload a picture in Akeneo Pim 5, the endpoint documentation is:
Akeneo Pim 5 - API Documentation
Someone know what I am doing wrong?
Image 01 - Postman
Image 02 - Postman
This request on postman works fine, but I am trying to do it with a guzzle, I already have the first request getting the token.
My Request:
$client2 = new Client();
$file = '/tmp/T_square.jpg';
$url2 = "http://akeneo-pim.local/api/rest/v1/media-files";
$response2 = $client2->request('POST', $url2, [
'headers' => [
'Authorization' => 'Bearer ' . $response->access_token,
'Content-Type' => 'multipart/form-data',
'Accept' => 'application/x-www-form-urlencoded'
],
'multipart' => [
'product' => [
"identifier" => "teste_image",
"attribute" => "picture",
"locale" => null,
"scope" => null
],
'file' => fopen($file, 'r'),
]
]);