How to Enable Session Support when Express is Created

  node.js, question

express -e -s XXX

Report an error unknown -s option

Is it a version problem? Express 3.0 should work. What about 4.0?

Express does not have the -s parameter

Usage: express [options] [dir]
 -h, --help          output usage information
 -V, --version       output the version number
 -e, --ejs           add ejs engine support (defaults to jade)
 --hbs           add handlebars engine support
 -H, --hogan         add hogan.js engine support
 -c, --css <engine>  add stylesheet <engine> support (less|stylus|compass|sass) (defaults to plain css)
 --git           add .gitignore
 -f, --force         force on non-empty directory