gistfile1.rb

# user.rb
  after_create :create_money_bird_user

  def create_money_bird_user
    contact             = MoneyBirdContact.new
    contact.customer_id = "sjamar_#{self.id}"
    contact.first_name  = self.first_name
    contact.last_name   = self.first_name
    contact.email       = self.email
    if contact.save
      logger.info "Contact saved"
    else
       logger.info contact.errors.inspect
    end
    invoice               = MoneyBirdRecurringTemplate.new
    invoice.frequency     = 1 #number of times per period
    invoice.contact_id    = contact.id
    invoice.frequency_type= 5 #1 for weekly, 2 for monthly, 3 for quarterly, 4 for half_yearly or 5 for yearly
    invoice.details_attributes = [
        { :description => "my_description", :price => 100.00 }
      ]
    invoice.save
  end