Ruby exception in class

class AuthorizationException < Exception
end

class User
  attr_accessor :name, :email, :password, :address, :refferal_id

  def tweets
    @tweets = Array.new
  end

  def tweets=(tweet)
     @tweets.push
  end

  def initialize(name, email, password, details = {})
    self.name = name
    self.email = email
    self.password = password
    self.address = details[:address]
    self.refferal_id = details[:refferal_id]
  end

  def get_tweets(list)
    unless list == "Abhimanyu Aryan"
      raise AuthorizationException.new
    end
    @tweets
  end

  begin
    tweets = get_tweets("Abhimanyu Aryan")
  rescue AuthorizationException
    puts "Authentication Error"
  end
end

user = User.new "Abhimanyu Aryan", "abhimanyuaryan@mail.com", "1234", :address => "stackoverflow"