User Roles in Firebird

Is there a way to use a role on a Firebird DB?

I connect to a Firebird database, which requires the use of a role. But in the connection manager there's no field for a role.

I tried adding it to the USER field, separated with a space,slash,doublecolon... I imagined something like adding a port to an IP might work.

I currently can connect to the DB, but only some tables/views etc. are listed, and i can't view any data.