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

<?php

namespace App\Models;

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

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

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

    public function collaborators(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'movie_list_user');
    }
}