initalizer to get auth key from third party provider

init.rb

def initialize(username, password)
      auth = {:username => username, :password => password}
      begin
        begin
          response = HTTParty.get("https://security.example.com/login", :basic_auth => auth)
          case response.code
            when 200
              puts "All good!"
              data = JSON.parse(response.body)
              @token = token = JSON.parse(response.body)['token']
            when 404
              puts "O noes not found!"
            when 500...600
              puts "ZOMG ERROR #{response.code}"
          end
        rescue Exception => e
          puts "#{e.message}"
        end
      end while response.code != 200
  end