title: How to generate a URL for chatting with a user in a Facebook page using the page scoped id PSID
body: <p>We have a chatbot on <strong>Facebook Messenger Platform</strong>, we want to provide the admins an URL to chat with a specific user, for example: <code>https://facebook.com/&lt;page-id&gt;/u/&lt;user-psid&gt;</code></p>
  
  <p>Currently when opening a chatting thread in a Facebook page URL is <code>https://www.facebook.com/&lt;page-id&gt;/inbox/?mailbox_id=&lt;page-id&gt;&amp;selected_item_id=&lt;user-id&gt;</code></p>
  
  <p>when we tried replacing the <code>user-id</code> with the <strong>PSID</strong> it didn't work.</p>
  
  <p>Is there a way to achieve this? we just want a URL to redirect to Facebook page chatting with a user who already talked to the bot and we have his/her <strong>PSID</strong>.</p>