old_contents: const passport = require('passport');
  const User = require('../models/user');
  const config = require('../config');
  const JwtStrategy = require('passport-jwt').Strategy;
  const ExtractJwt = require('passport-jwt').ExtractJwt;
  const LocalStrategy = require('passport-local');
  
  // Create local strategy
  const localOptions = { usernameField: 'email' };
  const localLogin = new LocalStrategy(localOptions, function(email, password, done) {
  	// Verify this email and password, call done with the user
  	// if it is the correct email and password
  	// Otherwise, call done with false
  	User.findOne({ email: email }, function(err, user) {
  		if (err) {return done(err); }
  		if (!user) { return done(null, false); }
  
  		// Compare passwords - is 'password' equal to user.password?
  		user.comparePassword(password, function(err, isMatch) {
  			if (err) { return done(err) }
  			if (!isMatch) { return done(null, false); }
  
  			return done(null, user);
  		});
  	});
  });
  
  // Setup options for Jwt Strategy
  const jwtOptions = {
  	jwtFromRequest: ExtractJwt.fromHeader('authorization'),
  	secretOrKey: config.secret
  };
  
  // Create JWT Strategy
  const jwtLogin = new JwtStrategy(jwtOptions, function(payload, done) {
  	// See if the user ID in the payload exists in our database
  	// If it does, call 'done' with the user
  	// Otherwise, call 'done' without a user object
  	User.findById(payload.sub, function(err, user) {
  		if (err) { return done(err, false); }
  
  		if (user) {
  			done(null, user);
  		} else {
  			done(null, false);
  		}
  	});
  });
  
  // Tell passport to use this strategy
  passport.use(jwtLogin);
  passport.use(localLogin);
  
new_contents: const passport = require('passport');
  const User = require('../models/user');
  const JwtStrategy = require('passport-jwt').Strategy;
  const ExtractJwt = require('passport-jwt').ExtractJwt;
  const LocalStrategy = require('passport-local');
  require('dotenv').config()
  
  // Create local strategy
  const localOptions = { usernameField: 'email' };
  const localLogin = new LocalStrategy(localOptions, function(email, password, done) {
  	// Verify this email and password, call done with the user
  	// if it is the correct email and password
  	// Otherwise, call done with false
  	User.findOne({ email: email }, function(err, user) {
  		if (err) {return done(err); }
  		if (!user) { return done(null, false); }
  
  		// Compare passwords - is 'password' equal to user.password?
  		user.comparePassword(password, function(err, isMatch) {
  			if (err) { return done(err) }
  			if (!isMatch) { return done(null, false); }
  
  			return done(null, user);
  		});
  	});
  });
  
  // Setup options for Jwt Strategy
  const jwtOptions = {
  	jwtFromRequest: ExtractJwt.fromHeader('authorization'),
  	secretOrKey: config.secret
  };
  
  // Create JWT Strategy
  const jwtLogin = new JwtStrategy(jwtOptions, function(payload, done) {
  	// See if the user ID in the payload exists in our database
  	// If it does, call 'done' with the user
  	// Otherwise, call 'done' without a user object
  	User.findById(payload.sub, function(err, user) {
  		if (err) { return done(err, false); }
  
  		if (user) {
  			done(null, user);
  		} else {
  			done(null, false);
  		}
  	});
  });
  
  // Tell passport to use this strategy
  passport.use(jwtLogin);
  passport.use(localLogin);
  
subject: Remove config file dependency from passport.js