Function authorize_with_fetched_list_of_roles 

pub async fn authorize_with_fetched_list_of_roles(
    conn: &mut PgConnection,
    action: Action,
    resource: Resource,
    user_roles: &[Role],
) -> AuthorizationResult<AuthorizationToken>

Same as authorize, but takes already-fetched roles instead of querying for them; use when checking several actions for the same user.