Laravel 5.8 Passport "resulted in a `401 Unauthorized`"

I have an issue with my laravel 5.8 project..

I want to make registration and get tokens using passport with Guzzle but when i post a new record to get token, i get error saying

"`POST http://femlife.test/oauth/token` resulted in a `401 Unauthorized` response:
{"error":"invalid_credentials","error_description":"The user credentials were incorrect.","message":"The user credential (truncated...)"

Here is my code:

$http = new Client;

    $response = $http->post('http://femlife.test/oauth/token', [
        'form_params' => [
            'grant_type' => 'password',
            'client_id' => 2,
            'client_secret' => 'gpnQCoxmAxeiW8srk50j5onLiwvRs3dc8aiID3S3',
            'username' => $request->name,
            'password' => $request->password,
            'scope' => '',
            'code' => 200,
            'redirect_uri' => 'http://localhost'
        ],
    ]);

    return response(['data'=>json_decode((string) $response->getBody(), true)]);

Please, What am i doing wrong? I saw some suggestions that i have to separate Server and Client instances because now,am using one XAMPP instance..