def save_with_payment
    if valid?
      client = Paymill::Client.create email: email, description: name
      payment = Paymill::Payment.create token: paymill_card_token, client: client.id
      subscription = Paymill::Subscription.create offer: plan.paymill_id, client: client.id, payment: payment.id
      if check_transaction?(client)
       self.paymill_id = subscription.id
       save!
      end
    end
  rescue Paymill::PaymillError => e
    logger.error "Paymill error while creating customer: #{e.message}"
    errors.add :base, "There was a problem with your credit card. Please try again."
    false
  end
 def check_transaction?(client)
    case Paymill::Transaction.all({client: client.id, order: "created_at_desc"})[0].response_code
      when 20000 then; return true
      # all the possible errors should be listed with translations. For instance
      when 40104 then errors.add :base, "Card invalid."; return false
      #40104 is the response_code you get when using a test card
      else errors.add :base, "Something whent wrong."; return false
    end
  end