リフレッシュトークン

try {

  // api call to protected route
  const response = await fetch();

  if (res.status === 200) {

    // update state management library with accessToken, refreshToken you have received from response
    // update cookies/LocalStorage with accessToken, refreshToken you have received from response

  } else {

    // perform necessary action

  }
} catch (error) {

  if (error.response.status === 401) {

    // get refreshToken from cookies or localstorage . in My case it's from cookies
    const refreshToken = cookies.readCookie("refreshToken");

    if (refreshToken) {

      // api call to GET new accessToken & refreshToken
      const response = await fetch();

      // update state management library with accessToken, refreshToken you have received from response
      // update cookies/LocalStorage with accessToken, refreshToken you have received from response

    } else {

      // redirect user to login

    }
  }
}