```ruby
require "fog/google/storage_xml"
require "fog/google/storage_json"

module Fog
  module Storage
    class Google < Fog::Service
      def self.new(options = {})
        if options.keys.include? :google_storage_access_key_id or
          (Fog.credentials and Fog.credentials.keys.include? :google_storage_access_key_id)
          Fog::Storage::GoogleXML.new(options)
        else
          Fog::Storage::GoogleJSON.new(options)
        end
      end
    end
  end
end
```

Handle case where Fog.credentials is empty
user
```ruby
require "fog/google/storage_xml"
require "fog/google/storage_json"

module Fog
  module Storage
    class Google < Fog::Service
      def self.new(options = {})
        begin
          fog_creds = Fog.credentials
        rescue
          fog_creds = nil
        end

        if options.keys.include? :google_storage_access_key_id or
          (not fog_creds.nil? and fog_creds.keys.include? :google_storage_access_key_id)
          Fog::Storage::GoogleXML.new(options)
        else
          Fog::Storage::GoogleJSON.new(options)
        end
      end
    end
  end
end
```
assistant