movie-night-nuevo/app/Models/MovieList.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;

class MovieList extends Model
{
    protected $fillable = [
        'user_id',
        'name',
        'is_public'
    ];

    public function movies(): BelongsToMany
    {
        return $this->belongsToMany(Movie::class);
    }

    public function owner(): BelongsTo
    {
        return $this->belongsTo(User::class, 'user_id');
    }
}