node.js - TypeError: Object is not a functon in nodejs -

i'm doing user authentication through nodejs. typeerror: oject not function throwing error this

user.js

// instance of mongoose , mongoose.schema var mongoose = require('mongoose'); var schema = mongoose.schema; // set mongoose model , pass using module.exports module.exports = mongoose.model('user', new schema({     name: string,     password: string,     admin: boolean })); 

server.js

user = require('./models/user'); app.get('/setup', function (req, res) {     // create sample user     var nick = new user({ // in line throwing error object not function.         name: 'nick cerminara',         password: 'password',         admin: true     });     // save sample user     nick.save(function (err) {         if (err) throw err;         console.log('user saved successfully');         res.json({             success: true         });     }); });