Token Based Authorization for Zoho Subscriptions?

Token Based Authorization for Zoho Subscriptions?

I'm working on an integration with Zoho Subscriptions on my website.  

I'd like to use the token-based authentication scheme that is documented for Zoho CRM, so that I don't have to store authorization information in my code.  

As far as I can tell in the documentation, this method isn't supported for Zoho Subscriptions.  

Can you provide some guidance?  

Thanks!