How does Trino handle user-level authentication for a cutom data source?

[Tommo56700]

I have found it is possible to connect a HTTP data source to Trino: https://trino.io/docs/current/develop/example-http.html

I want to know if, in general, can Trino handle user-level authentication for a custom data source. Say I am connecting to two data sources: X is a postgres database with simple username password authentication for all users, Y is a custom HTTP connector to a REST API where a bearer token must be passed in the request header per user.

Is it possible to do a simple query joining data from X and Y, if each user will need to provide their own credentials?

Are there any examples of custom connector plugins that authenticate users in this way?