can't filter by attributes

[alanRiveros]

Hi I've tried for hours to get a simple filtered result with php Client
$params = [ 'filter[pa_writer]' => 'stephen king' ]; $response = $this->client->get('products', $params);

can you give me a little example of a request filtered by attribute or other fields.
in the woocommerce-rest-api-docs i've found this table

but nothing work in the client only the example of listing All products.
thank you
have an epic day! =D

[alanRiveros]

anyone? help?