code: def User(self, Username=''):
          
          if not Username:
              Username = self.CurrentUserHandle
          o = User(self, Username)
          o.OnlineStatus # Test if such a user exists.
          return o
docs: Queries a user object.
  
          :Parameters:
            Username : str
              Skypename of the user.
  
          :return: A user object.
          :rtype: `user.User`