is it possible to call a Puppet function like postgresql_password() when looking up data from Hiera (and using create_resources())?

db01.example.com.yaml

---
profile::postgresql::server::dbs:
  redmine:
    user: redmine
    password: "postgresql_password('redmine', 'xxx')"

# The above results in puppetlabs-postgresql's Postgresql::Server::Role class 
# passing the string "postgresql_password('redmine', 'xxx')" verbatim as 
# ENCRYPTED PASSWORD to the ALTER ROLE statement postgresql_psql creates, which of course fails.

server.pp

# modules/profile/manifests/postgresql/server.pp

class profile::postgresql::server {
  include '::postgresql::server'
  include '::postgresql::server::contrib'
  include '::postgresql::globals'

  $dbs = hiera_hash('profile::postgresql::server::dbs', {})
  create_resources('::postgresql::server::db', $dbs)

}