In PHP, I am developing an application that is going to use the Braintree Marketplace functionality - for users within my platform to be able to handle escrow transactions for projects they post. I understand the code on how to do actual transactions, but I am having issues on the sub-merchant process and where that necessary code is supposed to go.
I have looked extensively on how to onboard sub-merchants with the code from their documentation, but where am I supposed to put all this? On its own separate page? The only coding example is the very basics here on Github. I need to be able to create these sub-merchants so that I can test escrow within their Sandbox.