auth.js

const passport = require('koa-passport');
const BasicStrategy = require('passport-http').BasicStrategy;

//we need user model to connect to DB to verify user credentials
const User = require('./models/users');
//implement the basic auth strategy
passport.use(new BasicStrategy(
    
    
    function(userid, password, done) {
        
        
        User.findOne({ username:userid, password:password}, function (err, user) {
            
            
            if (err) { return done(err); }
            if (!user) { return done(null, user); }
            return done(null, user);
      });
    }
  ));