Custom Parameters to token endpoint

[z1haze]

Hello, I am attempting to use this library for authenticating via Salesforce's SLAS and one of their requirements is that token url requires an additional parameters into the body to designate an IDP. You can see here and search for channel_id. Is this possible with this library? https://developer.salesforce.com/docs/commerce/commerce-api/references/shopper-login?meta=getAccessToken

The documentation here mentions that parameters can be added, but in my testing, they are not being send in the body.
https://github.com/panva/openid-client/blob/main/docs/functions/authorizationCodeGrant.md

[z1haze]

Well, this is embarrassing... Sorry, it works fine! Just needed the param on both authorize and token endpoints!