Xboard/app/Models/ServerGroup.php

<?php

namespace App\Models;

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

class ServerGroup extends Model
{
    protected $table = 'v2_server_group';
    protected $dateFormat = 'U';
    protected $casts = [
        'created_at' => 'timestamp',
        'updated_at' => 'timestamp'
    ];

    public function users(): HasMany
    {
        return $this->hasMany(User::class, 'group_id', 'id');
    }

    public function servers()
    {
        return Server::whereJsonContains('group_ids', (string) $this->id)->get();
    }
}