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app/Http/Controllers/api/TelegramWebHook.php

@@ -65,7 +65,7 @@ class TelegramWebHook extends BaseController
             try {
                 $chatId = $message->chat->id;
                 $firstName = $message->chat->firstName;
-                $username = $message->chat->username;
+                $username = '';
                 $messageId = $message->messageId;
                 if (!$from->isBot) {
                     $chatId = $from->id;