provide JWT token in transactions

In my Postgres DB, I have some tables where I have specified some default inserts based on passed in JWT token claims. This was from using a different solution..but utlimately, in Postgres, I could specify the variable using this format for example. I could place this in the default value, such that upon insert, it would use the logged in users "userid" value.

(current_setting('request.jwt.claims.userid'::text, true))::integer

Does Hasura pass the JWT claims to Postgres like this? I tried the above, but nothing was recognized so I'm wondering if you don't pass them or if you use a different format.