oauth2-server-laravel的问题

I'm new to OAuth. I'm trying to implement https://github.com/lucadegasperi/oauth2-server-laravel#password-flow

I've already inserted id and secret into oauth_clients table. Also I have inserted username and password into users table. (via Phpmyadmin)

After I try to do the request:

POST http://localhost:8000/oauth/access_token?
grant_type=password&
client_id=weredfsdfsrq341&
client_secret=dfwefsdf&
username=test@test.com&
password=123456

But response is:

{
error: "invalid_request"
error_description: "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed. Check the "client_id" parameter."
}

My route is

Route::post('oauth/access_token', function()
{
    return AuthorizationServer::performAccessTokenFlow();
});

What am I doing wrong?

Please make sure the content type is set to "x-www-form-urlencoded" when you make that POST.

Not sure whether you found the answer to this, but, this is a bug in the package as discussed here Here

Basically when the content type is json the parameters are not handled correctly by the package. Fix: Locate $authorizer->setRequest($app['request']); in vendor/lucadegasperi/oauth-server-laravel/src/OAuth2ServerServiceProvider.php and add this line just above it

 $app['request']->replace(\Input::all());

I might be wrong, but I think you missed the parameter scope. Just a guess.