module Auth PROVIDERS = { "None" => "", "OpenID" => "openid" }.tap do |providers| providers["Google"] = "google" if defined?(GOOGLE_AUTH_ID) providers["Facebook"] = "facebook" if defined?(FACEBOOK_AUTH_ID) providers["Windows Live"] = "windowslive" if defined?(WINDOWSLIVE_AUTH_ID) providers["GitHub"] = "github" if defined?(GITHUB_AUTH_ID) end.freeze end