title: Telegram bot initiate conversation with a user
body: <p>I am writing a Telegram bot, to simplify the issue let's say you can ask the bot questions in a channel and it replies to you in private. When the bot receives the command it takes the <code>chat_id</code> of the user from: <code>update.message.from_user.id</code> </p>
  
  <p>But when I do this I get an error: </p>
  
  <pre><code>Unauthorized: Forbidden: bot can't initiate conversation with a user
  </code></pre>
  
  <p>This sounds quite logical, as I assume this prevents from writing spam bots. The question is how do I overcome it? How can I let the user enable private messages from the bot?</p>
  
  <p><strong>Note:</strong> The bot does succeed sending messages to me but not to other users.</p>