zapishis-client/apps/web/config/auth.ts

import { type AuthOptions } from 'next-auth';
import CredentialsProvider from 'next-auth/providers/credentials';

export const authOptions: AuthOptions = {
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.id = user.id;
      }

      return token;
    },
    async session({ session, token }) {
      if (token?.id && session?.user) {
        session.user.telegramId = token.id as number;
      }

      return session;
    },
  },
  providers: [
    CredentialsProvider({
      async authorize(credentials) {
        const { telegramId } = credentials ?? {};

        if (!telegramId) {
          throw new Error('Invalid Telegram ID');
        }

        return { id: telegramId };
      },
      credentials: {
        telegramId: { label: 'Telegram ID', type: 'text' },
      },
      id: 'telegram',
      name: 'Telegram',
    }),
  ],
  session: {
    strategy: 'jwt',
  },
};