I need experienced developers on this one please. Or if you have the knowledge please. My client has just told me that he wants the assistant to be able to fetch invoices from Xero. My question is, will I be able to do this with an API or an automation tool like Make (it's the only that'll work). And how do I collect information that is on a Google Sheet and display it on my chatbot. If it sounds confusing, please let me know.