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- Support authentication credentials in YAML file in /config
- Test on persistent connection to Shoeboxed
- Check whether receipts have notes (not in doc!)
- Limit results param to 50, 100, 200
- Implement cover sheets
- find_by_id should probably update the internal cached array.
- rshoeboxed compat mode?
- uploads support
- allow users to set page size
- allow setting params before reading so setting modified_date doesn't result in double read