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    Google Pay Authorizations
    This section shows you how to make a successful authorization request.
After you send the request, check the response messages to make sure that the request was
            successful. 
A 200-level HTTP response code indicates
                success.
Follow-on Transactions
            After the initial transaction is complete, additional follow-on transactions can be
                made as Merchant-Initiated Transactions (MITs). 
Endpoint
			Production:
					POST 
https://nabgateway-api.nab.com.au
/pts/v2/paymentsTest:
					POST 
https://nabgateway-api-test.nab.com.au
/pts/v2/payments