Are you hosting it on a websever with Cpanel? You could make a database in the phpmyadmin section. I don't know much about js but I think you'll probably just need to call tables from the database, I'm sure you can find some webpages and gain a better understanding on how to do this. I can probably offer a little assistance not much as I don't have much experiences making program but do have a decent understanding on the handles I believe.

Spartan wrote Are you hosting it on a websever with Cpanel? You could make a database in the phpmyadmin section. I don't know much about js but I think you'll probably just need to call tables from the database, I'm sure you can find some webpages and gain a better understanding on how to do this. I can probably offer a little assistance not much as I don't have much experiences making program but do have a decent understanding on the handles I believe.

No, it's just to store the steam accounts I should have said I have little experience with programming at all, this is my first project so it won't be on a website it will just be to store data I was looking into mongodb but I don't know if thats what I need

If you are using js I would recommend redis or cassandra.
here is a full list of databases you can use with js
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then just look up tutorials for the one you decided to use.

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I also recommend the book, "Eloquent Javascript 2."

Also, go on CodeWars, and practice some "whiteboard" coding challenges. This will help you learn the native Javascript library, and practice solving CS challenges that you may come across in an interview, using JS. The MDN library should also be your best-friend.