title: Firebase React Native Current User confusion
body: <p>I am attempting to make a "Welcome, {username}" page after the user logs in to my app. I am getting an undefined error when trying to pull the current user info into my view, and am only able to load user data in a componentWillMount wrapper.</p>
  
  <p>What's the best way to get the user data to display after the component "mounts?" Perhaps I am not fully understanding this concept?</p>