{
"merchantNo": "string",
"bizOrderNo": "string"
}curl --location '/api/v1/ex/txn/query/credential' \
--header 'x-app-id;' \
--header 'x-request-id;' \
--header 'x-signature;' \
--header 'Content-Type: application/json' \
--data '{
"merchantNo": "string",
"bizOrderNo": "string"
}'{
"code": "string",
"message": "string",
"data": {
"previewUrl": "string",
"url": "string"
}
}