unable to send email using sendgrid – Nginx

   // this is my code
//unable to send email using sendgrid
// finding email from body
    exports.signUp=async (req,res)=>{
        const userExists = await User.findOne({ email: req.body.email })
        if(userExists){
            return res.status(400).json({
                error:"eamil is already taken"
            })
        }
        const token = jwt.sign(req.body, process.env.ACCOUNT_ACTIVATION,{expiresIn:'20m'})
        const emailSend = {
            from: process.env.EMAIL_FROM,
            to: req.body.email,
            subject:`Acoount activation link`,
            html:`
                <p> Please click the following link to activate</p>
    
                <a>http://localhost:8000/api/auth/activate/${token}</a>
            `
        }
        sgMail.send(emailSend).then(sent=>{
            return res.status(200).json({
                message:'email has been sent to you emailid'
            })
        })
        .catch(err=>console.log(err))
    }
    
    
    
   // this is error am getting
// am getting this error 
    
   

ResponseError: Forbidden
at D:[email protected]:146:29
at processTicksAndRejections (internal/process/task_queues.js:93:5) {
code: 403,
response: {
headers: {
server: ‘nginx’,
date: ‘Thu, 07 Jan 2021 11:55:26 GMT’,
‘content-type’: ‘application/json’,
‘content-length’: ‘281’,
connection: ‘close’,
‘access-control-allow-origin’: ‘https://sendgrid.api-docs.io’,
‘access-control-allow-methods’: ‘POST’,
‘access-control-allow-headers’: ‘Authorization, Content-Type, On-behalf-of, x-sg-elas-acl’,
‘access-control-max-age’: ‘600’,
‘x-no-cors-reason’: ‘https://sendgrid.com/docs/Classroom/Basics/API/cors.html’
},
body: { errors: [Array] }
}
}