Payment Gateway is Invalid - OMISE- using "checkoutCompleteWithCreditCardV2" mutation

[ilivestrong]

Hi,

I am facing issue while completing checkout using "checkoutCompleteWithCreditCardV2" mutation using OMISE payment gateway(setup using integration in apps section)

The OMISE integration works great with web checkout, but when I try to use it with Storefront GraphQL mutation "checkoutCompleteWithCreditCardV2" it gives me the below error:

Though if we use Shopify's out-of-the-box Bogus gateway (both with web/ APIs) it works great!

Any ideas how to make this mutation work with OMISE payment gateway integrated in Shopify ?

Any help would be greatly appreciated!

Thanks.

Deep

{
    "data": {
        "checkoutCompleteWithCreditCardV2": {
            "checkout": {
                "id": "Z2lkOi8vc2hvcGlmeS9DaGVja291dC83Y2ViNTE5MGFlMGM3NzY5OWMxMTMxZWY2OWI2YmY3Yz9rZXk9ZmIyOWQ5Njk5NDhmNWJhMGU3MmRmODljODNhN2ZjNDI="
            },
            "checkoutUserErrors": [
                {
                    "code": "INVALID",
                    "field": [
                        "payment"
                    ],
                    "message": "Payment gateway is invalid"
                }
            ],
            "payment": null
        }
    }
}