DEV: Logout saml user for IdP initiated logout request

lib/saml_authenticator.rb

@@ -67,7 +67,8 @@ class SamlAuthenticator < ::Auth::OAuth2Authenticator
                         authn_requests_signed: !!GlobalSetting.try(:saml_authn_requests_signed),
                         want_assertions_signed: !!GlobalSetting.try(:saml_want_assertions_signed),
                         signature_method: XMLSecurity::Document::RSA_SHA1
-                      }
+                      },
+                      idp_slo_session_destroy: proc { |env, session| @user.user_auth_tokens.destroy_all; @user.logged_out }
   end
 
   def attr(key)