wticreatorstudio/Modules/Customer/Entities/UserAdditionalContact.php

<?php

namespace Modules\Customer\Entities;

use Illuminate\Database\Eloquent\Model;
use App\Models\User;

class UserAdditionalContact extends Model
{
    protected $guarded = ["id"];
    
    public function user(){
        return $this->belongsTo(User::class, 'user_id', 'id');
    }
}