title: Slack webhook API file_created and file_shared
body: <p>I am working with slack webhook. Trying to understand the event API.</p>
  
  <p>I am getting confused with <code>file_created</code> and <code>file_shared</code> events. What is the difference between them? Gone through the official documentation but did not worked for me. </p>
  
  <p>Also, we receive file_id and id when an event is triggered, both ids are same. Is there any difference between them?</p>
  
  <p>use cases always help to understand :)</p>