[...nextauth]

route.ts

import NextAuth from "next-auth";
import CredentialProvider from "next-auth/providers/credentials";
import prisma from "@/libs/prisma";
import bcrypt from "bcrypt";

interface Credentials {
  email: string;
  password: string;
}

export const authOptions = {
  providers: [
    CredentialProvider({
      name: "Credentials",
      credentials: {
        email: { label: "email", type: "text" },
        password: {
          label: "password",
          type: "password",
        },
      },
      async authorize(credentials) {
        const { email, password } = credentials as Credentials;
        const user = await prisma.users.findUnique({
          where: { email: email },
        });

        if (!user) throw new Error("No user found");

        const verifyPassword = await bcrypt.compare(password, user.password);

        if (!verifyPassword) throw new Error("Wrong password");

        return {
          id: user.id.toString(),
        };
      },
    }),
  ],
  pages: {
    signIn: "/login",
  },
};

const handler = NextAuth(authOptions);

export { handler as GET, handler as POST };