Use authn.Cookie for SAML SSO

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/connect/v1/v1_resolver.go

@@ -427,7 +427,7 @@ func (r *mutationResolver) SignOut(ctx context.Context) (*types.SignOutPayload,
 	}
 
 	w := gqlutils.HTTPResponseWriterFromContext(ctx)
-	r.sessionCookie.Clear(w, session)
+	r.sessionCookie.Clear(w)
 
 	return &types.SignOutPayload{Success: true}, nil
 }