After registering a user in my node express server, I would like to send a verification email. If the user is created I use this function to send the email:

import dotenv from 'dotenv'

import sgMail from '@sendgrid/mail'



sgMail.setApiKey(process.env.SENDGRID_API_KEY)



const sendEmail = (to, token) => {

    const msg = {

        to,

        from: process.env.SENDGRID_SENDER,

        subject: 'Email Verification',

        text: `Please click the following link: http://localhost:5000/${token}`

    }

    

    sgMail

     .send(msg)

     .then((response) => {

        console.log(response[0].statusCode)

        console.log(response[0].headers)

    })

     .catch((error) => {

        console.error(error)

    })

}



export { sendEmail }

It is called here:

const registerUser = asyncHandler(async (req, res) => {

  const { name, email, password } = req.body



  const userExists = await User.findOne({ email })



  if (userExists) {

    res.status(400)

    throw new Error('User already exists')

  }



  const user = await User.create({

    name,

    email,

    password

  })



  if (user) {

    sendEmail(user.email, user.token) //HERE

    res.status(201).json({

      _id: user._id,

      name: user.name,

      email: user.email,

      isAdmin: user.isAdmin,

      isVerified: user.isVerified,

      token: generateToken(user._id),

    })

  } else {

    res.status(400)

    throw new Error('Invalid user data')

  }

})

The problem I am having is I get a ResponseError Unauthorized (code 401) when the request is made. The user does get created in the system. On my sendgrid account, I have verified the sender email with full access and I am storing my API Key in my .env file.

I have used 10 minute mail accounts to test this and real email accounts.