Use CredentialsProvider to enable Next Auth login functionality

I am encountering an issue where I retrieve a user from the database and store it in a variable called result. However, I noticed that the result object does not contain the password key, resulting in the value of result.password being undefined. I am unsure why this is happening and would appreciate any help or insights on this matter. I have seen others on YouTube perform similar actions, but their users do come with the password key.

import CredentialsProvider from "next-auth/providers/credentials"
import dbConnect from '../../../lib/dbConnect';
import User from '../../../models/User';
import { compare } from 'bcryptjs';


export default NextAuth({
    providers: [
        CredentialsProvider({
           name: 'Credentials',
           async authorize(credentials, req) {
               await dbConnect()

               console.log(credentials)

               //check user existence
               const result = await User.findOne({email: credentials.email})

               if(!result){
                   throw new Error('No user Found With Email Please Sign Up!')
               }

               console.log(result) /* the output give me the user back but without the 
                password so result.password is undefind 
                  {
                   _id: new ObjectId("63c6cf0eeed325fcb7d46dbd"),
                   name: 'test user',
                   email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d2b7aab3bfa2beb792b5bfb3bbbefcb1bdbf">[email protected]</a>',
                   provider: false,
                   isAdmin: false,
                   createdAt: 2023-01-17T16:38:38.133Z,
                   updatedAt: 2023-01-17T16:38:38.133Z,
                   __v: 0
                  }
                 even though i check the database and i found the user there with a 
                 password
                */

               //compare password
               const checkPassword = await compare(credentials.password, result.password)
               if(!checkPassword || result.email !== credentials.email){
                    throw new Error("Email or Password dosen't match")
               }
            return result
          }
        })
      ],
      database: process.env.DB_URL
   })

Answer №1

One problem is that the Mongoose model User has a select: false option set for the password field. This results in the password field being excluded from query results by default. To resolve this, you can include the select option in the findOne method like so:

 const result = await User.findOne({email:credentials.email}).select('+password')

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