From c9164157e57aaab385370cfb4835fb0f4511cd4d Mon Sep 17 00:00:00 2001
From: "Tracy.Wu" <tracy.wu@sqa-consulting.com>
Date: Thu, 8 Jul 2021 13:56:56 +0100
Subject: [PATCH] Fix possible key error

---
 fastapi_opa/auth/auth_saml.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fastapi_opa/auth/auth_saml.py b/fastapi_opa/auth/auth_saml.py
index e6d83d9..3a99c34 100644
--- a/fastapi_opa/auth/auth_saml.py
+++ b/fastapi_opa/auth/auth_saml.py
@@ -48,7 +48,8 @@ async def authenticate(
 
         elif 'slo' in request.query_params:
             logger.debug(datetime.utcnow(), '--slo--')
-            del request.session['saml_session']
+            if request.session.get('saml_session'):
+                del request.session['saml_session']
             return await self.single_log_out(auth)
 
         elif 'sls' in request.query_params: