fix when using getUpdates

src/Botan.php

@@ -83,6 +83,8 @@ class Botan
             throw new TelegramException('Input is empty!');
         }
 
+        self::$command = '';
+
         $obj = json_decode($input, true);
         if (isset($obj['message'])) {
             $data = $obj['message'];
@@ -117,8 +119,6 @@ class Botan
             return false;
         }
 
-        self::$command = '';
-
         $uid = $data['from']['id'];
         $request = str_replace(
             ['#TOKEN', '#UID', '#NAME'],