Using Prefab.cloud feature flags for cohort release of a new feature

templates.rb

client = Prefab::Client.new(api_key: "ACCT_ID|APIKEY")
@feature_flags = client.feature_flag_client

##
# Where usr is defined as
# usr = {id: 456, attributes: ["beta"]}

if @feature_flags.feature_is_on_for? "templates", "user:" + usr[:id], attributes: usr[:attributes]}
   ## Execute the templates feature logic