fix: conditional check for auth.active property

Adjusted the conditional check to use optional chaining for auth.active property. This change ensures safer access to the property.

src/index.ts

@@ -45,7 +45,7 @@ export const service = defineService(
         user?: User;
       } = c;
 
-      if (auth.active) {
+      if (auth?.active) {
         const organizationId = auth[
           "urn:zitadel:iam:user:resourceowner:id"
         ] as string;