How can I send messages to GitHub users

how can I send messages to GitHub users。
how can I send a message to GitHub users? Can I use it‘ users.noreply.github .com’

We don’t have a messaging system for GitHub. If the user hasn’t made any contact information available, you won’t be able to contact them.

If you have a question about one of their public repositories, you can always open an issue!

You can’t message them. Sometimes users will have a Twitter link on their profile, you can use that. If they don’t, you can open an issue on a repo, but I suggest doing so on a smaller, more “personal” repository.