How to deal with user roles when using the Laravel API?

Hello,

I am having a real problem with Laravel 5.5, been on it for a long time but cannot work out the best way to pass my user role_id when he gets a token via the route /oauth/token

From what I understand, the file that handles the token creation is the AccessTokenController here:

<?php

namespace Laravel\Passport\Http\Controllers;

use Laravel\Passport\TokenRepository;
use Lcobucci\JWT\Parser as JwtParser;
use Psr\Http\Message\ServerRequestInterface;
use Zend\Diactoros\Response as Psr7Response;
use League\OAuth2\Server\AuthorizationServer;

class AccessTokenController
{
    use HandlesOAuthErrors;

    /**
     * The authorization server.
     *
     * @var \League\OAuth2\Server\AuthorizationServer
     */
    protected $server;

    /**
     * The token repository instance.
     *
     * @var \Laravel\Passport\TokenRepository
     */
    protected $tokens;

    /**
     * The JWT parser instance.
     *
     * @var \Lcobucci\JWT\Parser
     */
    protected $jwt;

    /**
     * Create a new controller instance.
     *
     * @param  \League\OAuth2\Server\AuthorizationServer  $server
     * @param  \Laravel\Passport\TokenRepository  $tokens
     * @param  \Lcobucci\JWT\Parser  $jwt
     * @return void
     */
    public function __construct(AuthorizationServer $server,
                                TokenRepository $tokens,
                                JwtParser $jwt)
    {
        $this->jwt = $jwt;
        $this->server = $server;
        $this->tokens = $tokens;
    }

    /**
     * Authorize a client to access the user's account.
     *
     * @param  \Psr\Http\Message\ServerRequestInterface  $request
     * @return \Illuminate\Http\Response
     */
    public function issueToken(ServerRequestInterface $request)
    {
        return $this->withErrorHandling(function () use ($request) {
            return $this->convertResponse(
                $this->server->respondToAccessTokenRequest($request, new Psr7Response)
            );
        });
    }
}


But how to modify it so I also pass the role_id in the access token response?

Thank you.