Filemaker Pro + Oauth2?

[jbmia]

Forgive the potentially ignorant question here, but I built a trading journal app a couple years back that retrieves market quotes via TD Ameritrades developer API.. since they've been acquired by Schwab and migrated their API, they've implemented Oauth2 where apparently the auth token now expires and must be renewed or retrieved again via a redirect and callback URL... Given this is a stand alone app running in Pro, it appears based on some research that I won't be able to authenticate via this new method, since I'm not hosting a server... Can anyone experienced in these matters confirm or deny my conclusion? And if it is possible give me a point in the right direction? For reference here's the Schwab Oath2 details: https://developer.schwab.com/user-guides/get-started/authenticate-with-oauth

[comment]

Crosspost:
https://community.claris.com/en/s/question/0D5Vy00000BYO0fKAH/filemaker-pro-oauth2