Reads the current workbooks straight from SharePoint, as you.
This build can read SharePoint directly, but it needs an Azure app registration
first. Fill clientId into the BHY_SHAREPOINT block at the
top of this file, then re-upload it to your host. Until then the passphrase below
still opens the last snapshot.
Any number of NNNXXX-Cashflow.xlsx files. They are read in your browser — nothing is uploaded anywhere.