I'm trying to add TikTok to firebase custom authentication (openid). I have already created app in tiktok developers account and have the client id and secret.
I dont know where I can find the two remaining fields
Firebase wants to connect to your custom OIDC provider. So you have to pass the parameters of the OIDC provider of your choice. You'll use this if you already have a SSO server, and firebase needs to validate the tokens at your OIDC provider.