const newUser = new User ({
            name:req.body.name,
            email:req.body.email,
            password:req.body.password
          });
          // encrypting password
          bcrypt.genSalt(10, (err,salt)=>{
            bcrypt.hash(newUser.password,salt,(err,hash)=>{
              if(err) throw err;
              newUser.password = hash;
              newUser.save()
              .then(user=>{
                req.flash('success_msg','Registered users')
                res.redirect('/users/login')
              })
              .catch(err => {
                console.log(err)
                return;
              })
            });
          });