NodeJS post route

Hellow campers, kindly help me here, where am i going wrong, i am using postman to process my post request but it displays the the error please all add the fields and my fileds are all added and if i remove the statement it process an empty data to my mongo DB

app.post("/register",(req,res)=>{
    const {email, password} = req.body;
    if(!email && !password){
        return res.status(422).json({message: "please add all the fields"})
    }
    const newUser = new User({
        email,
        password
    });
    newUser.save((err)=>{
        if(err){
            console.log(err)
        }else{
            res.status(200).json({message: "added to the DB"})
        }
    });
});

my user schema and model

const userSchema = {
    email: String,
    password: String
};
//Creating user model
const User = mongoose.model("User", userSchema);

i have already solved the issue, i forget to add

app.use(express.json())

to accept allow the application to accept JSON