Simple example user model

UserModel.js

import mongoose from 'mongoose';

const { ObjectId } = mongoose.Schema.Types;
const Schema = mongoose.Schema;

const UserSchema = new Schema({
    name: {
        type: String,
        required: 'name is required',
    },   
    username: {
        type: String,
        required: 'username is required',
    },
    email: {
        type: String,
        required: 'email is required',
    },
    password: {
        type: String,
        required: 'password is required',
    },
    team: {
        type: ObjectId,
        ref: 'Team'
    }
}, { timestamps: true });

export default mongoose.model('User', UserSchema)