我正在尝试使用post请求将用户保存到mongodb数据库，如下所示，但我收到错误bcrypt错误：需要数据和哈希参数。这是代码的非常简单的设置，但我不知道它有什么问题。models
/ users.js

const mongoose = require('mongoose');

const bcrypt = require('bcrypt');

const confic = require('../models/users');



// User schema

const UserSchema = mongoose.Schema({

    name: {

        type: String,

    },

    email: {

        type: String,

        required: true

    },

    username:{

        type: String,

        required: true

    },

    password: {

        type: String,

        required: true

    }

});



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



module.exports.getUserById = function(id,callback){

    User.findById(id,callback);

}



module.exports.getUserByUsername = function(username,callback){

    const query = {username:username}

    User.findOne(query,callback);

}



module.exports.addUser= function (newUser, callback) {

   bcrypt.genSalt(10,(err,salt) => {

    bcrypt.hash(newUser.password, salt , (err, hash) =>{

        if(err) throw (err);



        newUser.password=hash;

        newUser.save(callback);

    });

   });

}

路线/users.js

const jwt = require('jsonwebtoken');

User = require('../models/users')



// // Register

router.post('/register', (req, res, next) => {

  var newUser = new User({

    name: req.body.name,

    email: req.body.email,

    username: req.body.username,

    password: req.body.password

  });



  User.addUser(newUser, (err, User) => {

    if(err){

      // res.json({success: false, msg:'Failed to register user'});

    } else {

      // res.json({success: true, msg:'User registered'});

    }



  });



});



// Authenticate

router.post('/authenticate', (req, res, next) => {

  res.send('AUTHENTICATE');

});



// Profile

router.get('/profile', (req, res, next) => {

  res.send('PROFILE');

});



module.exports = router;

服务器正在运行，但是在使用邮递员chrome后显示请求错误，并且服务器停止工作，如图中所示。