diff --git a/services/auth.py b/services/auth.py
index 840ee7f..5530940 100644
--- a/services/auth.py
+++ b/services/auth.py
@@ -10,7 +10,7 @@ INTERNAL_AUTH_SERVER = "v2.discours" in AUTH_URL or "testapi.discours" in AUTH_U
 async def check_auth(req):
     token = req.headers.get("Authorization")
     print(f"[services.auth] checking auth token: {token}")
-    
+
     query_name = "getSession" if INTERNAL_AUTH_SERVER else "session"
     query_type = "mutation" if INTERNAL_AUTH_SERVER else "query"
     operation = "GetUserId"
@@ -23,7 +23,7 @@ async def check_auth(req):
     gql = {
         "query": query_type + " " + operation + " { " + query_name + " { user { id } } " + " }",
         "operationName": operation,
-        "variables": "{}"
+        "variables": None
     }
 
     async with AsyncClient() as client: