title: how can i know my telegram-bot user pressed a button?
body: <p>I'm developing a telegram bot with <strong>python-telegram-bot</strong>.</p>
  
  <p>I send a message and a link (message body + inline keyboard button):</p>
  
  <p>my question is how can I know if user clicked () on the link?
  I want to do something if he clicked on link</p>
  
  <pre><code>btn = 'clicked'
  link = InlineKeyboardButton(btn, url='www.google.ir', callback_data=btn)
  keyboard = [[link]]
  reply_markup = InlineKeyboardMarkup(keyboard)
  bot.send_message(chat_id=uid, text='you should see this link to go next 
  </code></pre>