title: Add username, profile picture, etc to sign up with Firebase (Swift 2)
body: <p>Hey guys I've been watching some courses of making social apps and all of them were made with Parse, so now that I can't use it for the future because is shutting down I'm using Firebase.</p>
  
  <p>The thing is Firebase has some information about authenticate user with email and password and I don't know how to send the username, profile picture, bio, etc's user information to Firebase. Any help? Thank you.</p>