The redirect URI in the request, https://conference2020.sysinfo.com.tw/Account/AuthenticationResult, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit: https://console.developers.google.com/apis/credentials/oauthclient/455330586581-t25lrtanunftm5su55n20fp3mq9rvsou.apps.googleusercontent.com?project=455330586581