mod payment.py

backend/app/app/api/api_v1/endpoints/payment.py

@@ -131,7 +131,7 @@ def create_user(
     except Exception as error:
         print('An exception happened: ' + str(error))
         
-@router.post("/ecpayTestReturn", response_model=str)
+@router.post("/ecpayTestReturn")
 def create_user(
     *,
     MerchantID: str=Form(),