You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pay_bootstrap_user_mailer_preview.rb
    path of file: ./repos/tiddlyhost/rails/test/mailers/previews
    
    the code of the file until where you have to start completion: #
# To preview emails:
# - http://tiddlyhost.local:3333/rails/mailers/ or https://tiddlyhost.local/rails/mailers/
#
# Todo: Figure out which of these we are really using.
#
class PayBootstrapUserMailerPreview < ActionMailer::Preview

  def initialize(params = {})
    @user = User.first
    @customer =
    
  def initialize(params = {})
    @user = User.first
    @customer = @user.pay_customer_stripe
    @charge = @customer.charges.first

    # Not all emails use all these params but I'm being lazy
    @email_params = {
      pay_customer: @customer,
      pay_charge: @charge,
      date: Date.tomorrow,
      payment_indent_id: @charge.payment_intent_id,
    }

    super
  end