Stop new users from adding themselves!

although I don’t have a possibility for users to register on my site, I do have a persistent new user that has registered as a subscriber twice in the last 2 days. How is this possible, and how do I stop this?

hey there

@annetjeriel sorry but your question is not theme specific, you have to deal with the WordPress features and functions, most probably you need a plugin like Akismet or anything similar to stop spam users and comments on your website, try to search your question in the internet