sheet: character string of number of representing the sheet in the workbook to return. Only one sheet at a time can currently be returned
sha1: Character string of the file's SHA-1 hash, generated by source_data. Note if you are using data stored using Git, this is not the file's commit SHA-1 hash.
cache: logical. Whether or not to cache the data so that it is not downloaded every time the function is called.
clearCache: logical. Whether or not to clear the downloaded data from the cache.
...: arguments to pass to read.xlsx from the xlsx package.