---
title: UserErrorsShopPayPaymentRequestSessionUserErrorsCode - Storefront API
description: >-
  Possible error codes that can be returned by
  `ShopPayPaymentRequestSessionUserErrors`.
api_version: 2026-01
api_name: storefront
type: enum
api_type: graphql
source_url:
  html: >-
    https://shopify.dev/docs/api/storefront/latest/enums/UserErrorsShopPayPaymentRequestSessionUserErrorsCode
  md: >-
    https://shopify.dev/docs/api/storefront/latest/enums/UserErrorsShopPayPaymentRequestSessionUserErrorsCode.md
---

# User​Errors​Shop​Pay​Payment​Request​Session​User​Errors​Code

enum

Possible error codes that can be returned by `ShopPayPaymentRequestSessionUserErrors`.

## Valid values

* IDEMPOTENCY\_​KEY\_​ALREADY\_​USED

  Idempotency key has already been used.

* PAYMENT\_​REQUEST\_​INVALID\_​INPUT

  Payment request input is invalid.

* PAYMENT\_​REQUEST\_​NOT\_​FOUND

  Payment request not found.

***

## Fields

* [User​Errors​Shop​Pay​Payment​Request​Session​User​Errors.code](https://shopify.dev/docs/api/storefront/latest/objects/UserErrorsShopPayPaymentRequestSessionUserErrors#field-UserErrorsShopPayPaymentRequestSessionUserErrors.fields.code)

  OBJECT

  Error codes for failed Shop Pay payment request session mutations.

***

## Map

### Fields with this enum

* [User​Errors​Shop​Pay​Payment​Request​Session​User​Errors.code](https://shopify.dev/docs/api/storefront/latest/objects/UserErrorsShopPayPaymentRequestSessionUserErrors#field-UserErrorsShopPayPaymentRequestSessionUserErrors.fields.code)