Without this option, the aud is ignored. It works only with RPC admin storage. The shared key returned for all requests with the default shared admin storage, so enabling that option does not affect it.
sample store implementation
memory_store illustrates how to make a custom storage plugin for remark42.
In order to run remark42 with memory_store copy provided compose-dev-memstore.yml to the root directory and run:
docker-compose -f compose-dev-memstore.yml builddocker-compose -f compose-dev-memstore.yml up
As usual, demo site will run on http://127.0.0.1:8080/web/
note: in order to work with the latest (current) version of master go.mod uses replacement directive for the backend package. In real-life usage replace github.com/umputun/remark42/backend => ../../ should not be used.