Simple Sync Telegram bot with user without webhooks

TelegramBot.php

<?php
    public function sync() {
        $user_id = auth()->user()->id;
        $user = User::findOrFail($user_id);
        $searched_username = $user->telegram_username;
        if (!isset($searched_username) || ($searched_username === '')) {
          return ['success' => 'not', 'error' => 'Empty username'];
        }
            $response = Telegram::bot('bot_name')->getUpdates();
            $chat_id = 0;
            foreach ($response as $item) {
                if (isset($item['message']['chat']['username']) && ($item['message']['chat']['username'] === $searched_username)) {
                    $chat_id = $item['message']['chat']['id'];
                }
            }
            if ($chat_id > 0) {
                $user->telegram_chat_id = $chat_id;
                if ($user->save()) {
                    $this->sendMessage($user_id, "✅ Synchronization was successful!\n\nNow I can send you notifications!");
                    flash()->success('Done');
                    return ['success' => 'yes'];
                } else {
                    return ['success' => 'not', 'error' => 'Error when update user'];
                }
            } else {
                return ['success' => 'not', 'error' => 'Send message to bot'];
            }
        } 

    }