I am not quite sure, what you wish to accomplish. But all Trello usernames are public so you could access usernames from the relevant profile page. Every user can chose what information they make publicly available on their profile. You can check your own public profile for example via: http://trello.com/me
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. I'll be sharing with you a series of videos with my top tips on how to best use Trello...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events