Do you want to make twitter accounts private? If yes, then follow these steps:-
-Open the twitter app and login with your ID and Password.
-On the left corner tap on more options.
-Go to setting and privacy.
-From the list choose privacy and safety.
-Select the audience, media and tagging option.
-Check Protect your Post box.
-Confirm it and it's done.
-By these steps you can make your twitter account Private. To know more, you can visit the link.
https://getassist.net/how-to-make-twitter-account-private/