umami/pages/logout.js

import { useEffect } from 'react';
import { useRouter } from 'next/router';
import useApi from 'hooks/useApi';
import { setUser } from 'store/app';
import { removeClientAuthToken } from 'lib/client';

export default function LogoutPage({ disabled }) {
  const router = useRouter();
  const { post } = useApi();

  useEffect(() => {
    async function logout() {
      await post('/logout');
    }

    if (!disabled) {
      removeClientAuthToken();

      logout();

      router.push('/login');

      return () => setUser(null);
    }
  }, [disabled, router, post]);

  return null;
}

export async function getServerSideProps() {
  return {
    props: {
      disabled: !!(process.env.DISABLE_LOGIN || process.env.CLOUD_MODE),
    },
  };
}