I need my DMS System to talk seamlessly with Zoho Books. The only goal is dependable data synchronisation—client records, invoices and inventory must be pushed to DMS based on few conditions. I already have API keys, test accounts and the field mapping draft; what’s missing is the Python glue. The task is to write a small, well-structured Python 3 service (script or micro-app) that: • authenticates to both APIs (Zoho Books uses OAuth2) • pushes new or updated client details, invoices and inventory in near-real time • prevents duplicates and respects rate limits • logs every transaction for easy auditing Return a short README explaining setup, environment variables, how to run it on Ubuntu and how to extend the mapping later. Please include links to past API-integration work when you reply so I can see how you tackle similar challenges. If you have the time right now and the skills to make these two platforms sync flawlessly, let’s get started.