php - Laravel 8 - unsupported_grant_type

one text

Solution:

The problem was x-www-form-urlencoded.

This solved my problem (asForm)

$response = Http::asForm()->post('http://url.com', [
                'userName' => 'user',
                'password' => 'pass',
                'grant_type' => 'password'
        ]);

dd($response->json());