When configuring the Shopify API with authentication credentials in a ruby non-rail environment a depreciation warning occurs.
Here is the minimal code to reproduce it:
#!/usr/bin/ruby
require 'shopify_api'
API_KEY='my key'
PASSWORD='my password'
SHOP_NAME='my shop name'
shop_url = "https://#{API_KEY}:#{PASSWORD}@#{SHOP_NAME}.myshopify.com/admin"
ShopifyAPI::Base.api_version = '2020-10'
ShopifyAPI::Base.site = shop_url