Nextjs Signup Api using MongoDB

import { dbConnect } from "../../../lib/db-connect";
import User from "../../../model/user";
import { errorHandler, responseHandler, validateAllOnce } from "../../../utils/common";
import bcrypt from 'bcrypt';

export default async function handler(req,res){
    if(req.method!=="POST"){
  errorHandler("invalid",res) ;
  }else{
    try {
        const {name,email,password}=req.body;
        validateAllOnce(req.body);
    
        //create bd collection
       await dbConnect();
    
      const hashPassword=await bcrypt.hash(req.body.password,8);
       const user=new User({
           ...req.body,password:hashPassword});
    
       const saveUser= await user.save();
       if(saveUser){
           console.log({saveUser})
           const userDoc=saveUser._doc;
           delete userDoc.password;
           responseHandler(userDoc,res,201);
    
       }else{
           errorHandler("something wrong",res);
       }
    } catch (error) {
       errorHandler(error,res); 
    }
    
    }
  }