A must-read for those who are concerned about the security of their WordPress site
We explain how to enhance security with the free All in one WP Security plugin.

This time, we will explain User Security > Manual Approval Settings.

For more information, please see the All in one WP Security explanation table of contents!

There's an article that describes the steps taken to remove malware and restore a WordPress site after it was actually compromised by malware. Please refer to it.
→How to Prevent WordPress Tampering and Malware Infections, and How to Deal with Infections [Real-Life Experience Summary] "Anti-Malware Security"

What is manual approval setting in All in one Security?

If you are using WordPress for a membership site, this setting requires administrator approval when a new user registers.

• WP Security
• User Security
• Manual Approval

and set it up.

Manual Approval Settings

Just change the setting to ON.
When a user registers a new account, they will be added to the approval list of registered users, and after manual approval, the user will be able to log in.