OmniAuth Backstage
This is the OmniAuth strategy for authenticating to Backstage.
Usage
Rails.application.config.middleware.use OmniAuth::Builder do
provider :backstage, ENV['BACKSTAGE_CLIENT_ID'], ENV['BACKSTAGE_CLIENT_SECRET'], { site: ENV['BACKSTAGE_SITE'], authorize_url: ENV['BACKSTAGE_AUTHORIZE_URL'], token_url: ENV['BACKSTAGE_TOKEN_URL'] }
end