How to set custom payload/Claims on Laravel JWT?

user.php

<?php
namespace App\Models\Access\User;

use Illuminate\Foundation\Auth\User as Authenticatable;
use Tymon\JWTAuth\Contracts\JWTSubject;


/**
 * Class User.
 */
class User extends Authenticatable implements JWTSubject
{

    /**
     * Get the identifier that will be stored in the subject claim of the JWT.
     *
     * @return mixed
     */
    public function getJWTIdentifier()
    {
        return $this->getKey();
    }

    /**
     * Return a key value array, containing any custom claims to be added to the JWT.
     *
     * @return array
     */
    public function getJWTCustomClaims()
    {
        return [
            'id'              => $this->id,
            'first_name'      => $this->first_name,
            'last_name'       => $this->last_name,
            'email'           => $this->email,
            'picture'         => $this->getPicture(),
            'confirmed'       => $this->confirmed,
            'registered_at'   => $this->created_at->toIso8601String(),
            'last_updated_at' => $this->updated_at->toIso8601String(),
        ];
    }
}

This was helpful thank you