I want to find out how I can display the username of a user. For example user admin posts a forum, then I would see Created By: admin on the forum page, instead I can only fish out the ID.

I don't know a much about mongoose and I need someone who is familiar with it.

My Forum Model:

You see I have only ref: 'user' and this is grabbing the ObjectId("") from the User.

const forumSchema = ({
   forumName: {
      type: String,
      required: true,
   },
   forumDescription: {
      type: String,
      required: true,
   },
   user: { 
      type: Schema.Types.ObjectId,
      ref: 'user'
   },
   published_on: {
      type: String,
      default: moment().format("LLL")
   },
});

my userModel:

const UserSchema = mongoose.Schema({
   userID: {
      type: String,
      required: true,
   },
   userName: {
      type: String,
      required: true,
   },
   password: {
      type: String,
      required: true,
   },
   isAdministrator: {
      type: Boolean,
      deafult: false,
  },

});

Front-end :

As you can see only in {forum.user} there I can see the id from the user but I want his name not the id

 <footer className="blockquote-footer">
    Created by:{forum.user}
    Created on:{forum.published_on.substring(0,300)}
 </footer>