I'm making an app where a user makes a safe by going to /mysafe. But i only want to create it the first time when he goes there and for the next time when he goes to /mysafe it should redirect to /mysafe/theidofit.

See my app.js

app.get('/mysafe',async (req,res)=> {
    const safe=new Safe()
    safe.author=req.user._id
    safe.save()
    res.redirect(`/mysafe/${safe._id}`)
})

I tried adding a middleware but in my user schema i dont have a safe defined.Do i need to define it or can i do it without it?

const UserSchema = new Schema({
    email: {
        type: String,
        required: true,
        unique: true
    }   
});