var Fingerprint = require('express-fingerprint') app.use(Fingerprint({    parameters:[        // Defaults        Fingerprint.useragent,        Fingerprint.acceptHeaders,        Fingerprint.geoip,         // Additional parameters        function(next) {            // ...do something...            next(null,{            'param1':'value1'            })        },        function(next) {            // ...do something...            next(null,{            'param2':'value2'            })        },    ]})) app.get('*',function(req,res,next) {    // Fingerprint object    console.log(req.fingerprint)})