WP Fastest cache and Autoptimize

OK, I got this but my point here from the beginning is how to provide to the author my site’s URL – not the credentials – if I don’t want to publish it here.

That’s where you’re going wrong. You need to contact the author on your own. Don’t do it through these forums. If your intention is to share admin details then find the plugin’s private contact yourself (considering they want your private communication) and contact them directly. I’m a forum moderator, if you post something on the forum that cicumvents or breaks our rules by posting on the forums then we’ll moderate you without exception. Don’t put yourself in that position.

Again: I’m asking about sharing a site’s URL and NOT admin details!
We are turning in cycles here: you are still talking about admin details and I keep asking about how to share URLs.

But OK, well noted, thanks.

And I keep saying if you’re asking for their site to post their admin details, do not.

Join us on the Slack channel if you need further clarification.

Thanks Andrew, that’s fine and clear now.