Ekapp/skolehjem/app/UserEvent.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class UserEvent extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    //protected variable which contains name of database field(s) to be filled.
    protected $fillable = [
        'user_id', 'event_id'
    ];
}