auth.ts

import NextAuth from 'next-auth';
import Credentials from 'next-auth/providers/credentials';
import { authConfig } from './auth.config';
import { z } from 'zod';
import type { User } from './definitions/user';
import Users from './lib/users.json';

function getUser(email: string): User | undefined {
  const userInfo = Users.find(user => user.email === email);
  return userInfo;
}

export const { auth, signIn, signOut } = NextAuth({
  ...authConfig,
  providers: [
    Credentials({
      async authorize(credentials) {
        const parsedCredentials = z
          .object({ email: z.email() })
          .safeParse(credentials);

        if (parsedCredentials.success) {
          const { email } = parsedCredentials.data;
          const user = getUser(email);
          return user ? user : null;
        }

        return null;
      },
    }),
  ],
});