title: Slack - Show fullname of user instead of username
body: <p>Is there a way that in slack, we can show fullname of a user in the channel user list, instead of just the username? Since we have multiple teams and not all the people are familiar with usernames that users pick from different teams, its really difficult to identify who is who unless one goes to their profile or checks their fullname manually.</p>
  
  <p>So, is there a way to display the full usernames for users in the list instead of just the usernames?</p>