Mark reward code used

`markRewardCodeUsed(customerId, rewardCodeId)`

Marks a reward code as used, for example after the discount has been applied at an external checkout. The code is also deactivated in Shopify so it can no longer be redeemed. No stamps are refunded.

Arguments

Name	Type	Required	Description
`customerId`	`ID!`	Yes	The Shopify customer ID the code belongs to.
`rewardCodeId`	`ID!`	Yes	The reward code to mark used.

Returns a non-null RewardCode with used set to true.

Returns / Fields

Field	Type	Description
`id`	`ID!`	The reward code’s identifier.
`name`	`String`	Reward name.
`code`	`String`	The discount code.
`used`	`Boolean`	Whether it has been used (now `true`).
`createdAt`	`DateTime`	ISO-8601 timestamp.

Example

mutation {
  markRewardCodeUsed(customerId: "6677889900", rewardCodeId: "501") {
    id
    code
    used
  }
}

{
  "data": {
    "markRewardCodeUsed": {
      "id": "501",
      "code": "APPY-5OFF-XXXX",
      "used": true
    }
  }
}

Returns an error with message REWARD_CODE_NOT_FOUND if the code does not belong to the customer, or CUSTOMER_NOT_FOUND for an unknown customer.