Credentials as value object

Credentials.rb

class Credentials
  attr_reader :username, :password

  def initialize(parameters)
    @username = parameters[:username]
    @password = parameters[:password]
  end
end

credentials = Credentials.new(username: 'jimmy saville', password: 'nowthennowthen')
puts credentials.username
puts credentials.password

usage should be:

credentials = Credentials.new(:username => 'jimmy saville', :password => 'nowthennowthen')
puts credentials.username
puts credentials.password