where did i go wrong ?

const express = require("express");
const router = express.Router();
const User = require("../models/User");


//get login/register
router.get("/login",(req, res, next)=>{
  res.render("login");
});

router.post("/login", (req, res, next)=>{
  res.json(req.body);
})

router.get("/register",(req, res, next)=>{
  res.render("register", {
    title: "Register"
  });
});
router.post("/register",(req, res, next)=>{
  if(req.body.fname &&
    req.body.lname &&
    req.body.email &&
    req.body.password &&
    req.body.password2){

    if (req.body.password !== req.body.password2){
      //Change for better functionality
      var err = new Error("passwords do not matched")
      err.status = 400;
      return next(err);
    }
  const userData = {
      usr_fname: req.body.fname,
      usr_lname: req.body.lname,
      usr_email: req.body.email,
      usr_gender: req.body.gender,
      usr_addr: req.body.addr,
      usr_addr2:req.body.addr2,
      usr_zip:req.body.zip,
      usr_city:req.body.city,
      usr_state:req.body.state,
      password:req.body.password,
      usr_major:req.body.major,
      usr_DOB:req.body.DOB,
      usr_phone:req.body.phone,
      usr_OCC: req.body.Occ
      //usr_gradYear: req.body.gradYear,
      //usr_NonGrad: req.body.non_grad
    };
    //use the schema's creat method to add documtn into mongodb
  User.create(userData, (error, user)=> {
    if (error) {
      return(error);
    }else{
      return res.redirect('/register/payment');
    }
  });
    }else{
      const err = new Error('All the * fields are required');
      err.status = 400;
      return next(err);
    }
});

onst mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
  usr_fname: {
    type: String,
    required: true,
    trim: true
  },
  usr_lname: {
    type: String,
    required: true
  },
  usr_email: {
    type: String,
    unique: true,
    required: true,
    trim: true
  },
  usr_gender: {
    type: String
  },
  usr_addr: {
    type: String,
    trim: true
  },
  usr_addr2: {
    type: String,
    trim: true
  },
  usr_zip: {
    type: Number,
    trim: true
  },
  usr_city: {
    type: String,
    trim: true
  },
  usr_state: {
    type: String,
    trim: true
  },
  password: {
    type: String,
    required:true
  },
  usr_gradYear: {
    type: Date,
  },
  usr_major: {
    type: String,
    trim: true
  },
  usr_DOB: {
    type: Date
  },
  usr_phone: {
    type: Number,
    trim: true
  },
  usr_OCC:{
    type: String,
    trim: true
  }
});

const User = mongoose.model('User', UserSchema);
module.exports = User;

const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require('mongoose');
const path = require('path');
const app = express();


//mongodb connection
mongoose.connect("mongodb://localhost:27017/ccnyaumni", {useNewUrlParser: true});
mongoose.set('useCreateIndex', true);
const db = mongoose.connection;
//mongo error;
db.on('error', console.error.bind(console, 'connection Error:'));

//body parser middleware
app.use(bodyParser.urlencoded({extended: false}));

//middleware for static files
app.use('/static', express.static("public"));

//pug install
app.set('view engine', 'pug');

//routes access
const mainRoutes = require('./routes');
const signupRoutes = require('./routes/signup');

//routes middleware
app.use(mainRoutes);
app.use(signupRoutes);


//error middleware
app.use((req, res, next)=>{
  const err = new Error("Page Not Found");
  err.status = 404;
  next(err);
});

app.use((err, req, res, next)=>{
  res.status(err.status || 500);
  res.render('error',{message: err.message,
error:{}
});
});

const port = 3000;
app.listen(port,()=>{
  console.log("server is starting");
});