add integration tests for checking service token with overrides

backend/tests/helper/helper.ts

@@ -89,4 +89,8 @@ export const getServiceTokenFromTestUser = async () => {
 
 export const deleteAllSecrets = async () => {
   await Secret.deleteMany()
+}
+
+export const getAllSecrets = async () => {
+  return await Secret.find()
 }