Download Tableau reports in Excel format, by using their Tableau urls. Currently, you can extract custom views only.
npm install -g Tableau-Excel-Extractor
tableau-extract -u tableauUsername -p tableauPassword -s csvSeparator http://example.mytableau.com/#/views/MyWorkbook/MyView/myself/mycustomview
Full usage:
tableau-extract --help
All the above parameters are mandatory.