Get Characters from TBC Classic

Hello,

How can I get Characters from WoW Classic?

I want to develop a raid signup app. To prevent fake signups, trolling and to reduce no-shows I want the player to sign in with his battle.net account and select a real character.

Profile API seems to provide only characters for Retail.

So what is the recommended way to get TBC Classic Characters?

Best Regards,
Thomas

None. So far the API does not support character profiles for classic.