vito/app/Actions/Database/SyncDatabaseUsers.php

<?php

namespace App\Actions\Database;

use App\Enums\DatabaseUserStatus;
use App\Models\DatabaseUser;
use App\Models\Server;
use App\SSH\Services\Database\Database;

class SyncDatabaseUsers
{
    public function sync(Server $server): void
    {
        $service = $server->database();
        if (! $service instanceof \App\Models\Service) {
            return;
        }
        /** @var Database $handler */
        $handler = $service->handler();

        $this->updateUsers($server, $handler);
    }

    private function updateUsers(Server $server, Database $handler): void
    {
        $users = $handler->getUsers();
        foreach ($users as $user) {
            $databases = $user[2] != 'NULL' ? explode(',', $user[2]) : [];

            /** @var ?DatabaseUser $databaseUser */
            $databaseUser = $server->databaseUsers()
                ->where('username', $user[0])
                ->first();

            if ($databaseUser === null) {
                $server->databaseUsers()->create([
                    'username' => $user[0],
                    'host' => $user[1],
                    'databases' => $databases,
                    'status' => DatabaseUserStatus::READY,
                ]);

                continue;
            }

            $databaseUser->databases = $databases;
            $databaseUser->save();
        }
    }
}