app-api/app/Models/UserW.php

<?php
namespace App\Models;

use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Database\Eloquent\Model;

class UserW extends Model{

    use SoftDeletes;

    protected $connection = 'mysql_w';
    protected $table='user';
    protected $guarded=[];

    public function order()
    {
        return $this->hasMany(OrderW::class,'user_id');
    }

    public function scan()
    {
        return $this->hasMany(Scan::class,'user_id');
    }

    public function recom()
    {
        return $this->hasOne(UserW::class,'id','recomer_id');
    }
}