5.4 - Github.js

useEffect(() => {
    const existingToken = sessionStorage.getItem("token");
    const accessToken =
      window.location.search.split("=")[0] === "?access_token"
        ? window.location.search.split("=")[1]
        : null;

    if (!accessToken && !existingToken) {
      window.location.replace(
        `https://github.com/login/oauth/authorize?scope=user:email,repo&client_id=${clientId}`
      );
    }

    if (accessToken) {
      setToken(accessToken);
      sessionStorage.setItem("token", accessToken);
    }

    if (existingToken) {
      setToken(existingToken);
    }
    getIssues();
  }, []);