This is an example of how to delete customers via the Shopify Admin API

example_shopify_customer_deletion.rb

require 'httparty'
require 'date'

class ShopifyClient
  include HTTParty
  base_uri 'https://{shop_domain}.myshopify.com/admin/api/2023-10'

  def initialize(api_key, password)
    self.class.basic_auth(api_key, password)
  end

  def delete_usa_customers
    customers = get_recent_customers
    customers.each do |customer|
      if customer['addresses'].any? { |address| address['country_code'] == 'US' }
        delete_customer(customer['id'])
      end
    end
  end

  private

  def get_recent_customers
    yesterday = (Date.today - 1).iso8601
    response = self.class.get("/customers.json?created_at_min=#{yesterday}", format: :json)
    handle_pagination(response)
  end

  def delete_customer(customer_id)
    self.class.delete("/customers/#{customer_id}.json")
  end

  def handle_pagination(response)
    customers = response['customers']
    link_header = response.headers['link']

    if link_header && link_header.include?('rel="next"')
      next_page = link_header.match(/<(.+?)>; rel="next"/)[1]
      customers += handle_pagination(self.class.get(next_page, format: :json))
    end

    customers
  end
end

# Usage
shopify_client = ShopifyClient.new('api_key', 'password')
shopify_client.delete_usa_customers