Hello, I'm confused on how I can get setup to test my Markdown Manager API integration code. I have this seller account that is currently selling so I cannot use that account. The only way I've seen I can look at my promotions, is through the Selling Manager Pro, but that costs money. Basically all types of account I need for my dev. cost money. How can I get setup to properly test my code without wasting money on these fees? Thanks!