Gem::GemcutterUtilities#api_key

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/gemcutter_utilities.rb, line 46
def api_key
  if ENV["GEM_HOST_API_KEY"]
    ENV["GEM_HOST_API_KEY"]
  elsif options[:key]
    verify_api_key options[:key]
  elsif credential_store_key = Gem.configuration.credential_store_api_key_for(host)
    credential_store_key
  elsif Gem.configuration.api_keys.key?(host)
    Gem.configuration.api_keys[host]
  else
    key = Gem.configuration.rubygems_api_key

    # Once the store has refused to answer, this last resort would hand the
    # RubyGems.org key to a host that has one of its own, or come away with
    # nothing and let the caller ask for a password.
    if !@recognizing_session && Gem.configuration.credential_store_read_failed_for?(host) && (key.nil? || !default_host?)
      alert_error "The credential store could not be read, so no API key for #{host} could be found. " \
                  "Make the store readable and run the command again."
      terminate_interaction ERROR_CODE
    end

    key
  end
end