Hi, what did checkoutCompleteFree mutation input variable need except checkoutId? I have try run it with only checkoutId in input variable but it got
{
"data": {
"checkoutCompleteFree": {
"checkout": null,
"checkoutUserErrors": [
{
"code": "MISSING_PAYMENT_INPUT",
"field": null,
"message": "Checkout requires payment."
}
]
}
}
}