Laravel Passport - customize / add user data in the token response

TokenController.php

<?php

namespace App\Http\Controllers\Auth;

use App\User;
use Psr\Http\Message\ServerRequestInterface;
use League\OAuth2\Server\Exception\OAuthServerException;
use \Laravel\Passport\Http\Controllers\AccessTokenController as ATC;

class TokenController extends ATC
{
    public function issueToken(ServerRequestInterface $request)
    {
            $tokenResponse = parent::issueToken($request);
            $token = $tokenResponse->getContent();

            // $tokenInfo will contain the usual Laravel Passort token response.
            $tokenInfo = json_decode($token, true);

            if(isset($tokenInfo["error"]))
                return response([
                    "error" => "invalid_credentials",
                    "message" => "The user credentials were incorrect."], 401);

            // Then we just add the user to the response before returning it.
            $username = $request->getParsedBody()['username'];
            $user = User::whereEmail($username)->first();
            $user != null ? $user->roles : null;
            $tokenInfo = collect($tokenInfo);
            $tokenInfo->put('user', $user);


            return $tokenInfo;
    }

}