auth.ts

import mongoose from "mongoose";

export class AuthModel {
  model: mongoose.Model<mongoose.Document, {}>;
  constructor() {
   this.define();
  }
  
  private define() {
   this.model = mongoose.model("User", new mongoose.Schema({
    username: {
     type: String,
     required: true
    },
    password: {
     type: String,
     required: true
    }
   }, {
      timestamp: true
    }));
  }
  
  create(body: any): Promise<mongoose.Document> {
   return Promise.resolve(
    this.model.create(body)
   );
 }
 
 findByUsername(username: string): Promise<mongoose.Document> {
  return Promise.resolve(
   this.model.findOne({ username })
  );
 }
    
 findById(id: any): Promise<mongoose.Document> {
  return Promise.resolve(
   this.model.findById(id)
  );
 }
}