How to install & set up?

I’m confused about how to set up my “application data” in order to use the Twitter Hashtag Feed Widget plugin, which I really want very badly to use. Am I supposed to make a dummy app here (https://dev.twitter.com/apps) in order to get a consumer key/secret/etc, or does this plugin have its own app data? (Surely I don’t need to create an app if all I want to do is display a feed of tweets with a common hashtag?) It seems like I’m missing something super important.

Thanks for any help you can give me!

https://www.ads-software.com/extend/plugins/twitter-hashtag-feed-widget/