Ionic Capacitor 404 eror - inappbrowser is not in the npm registry

I got an error 404 from trying to install the inappbrowser plugin

npm install @ionic-enterprise/inappbrowser

npm ERR! code E404
npm ERR! 404 Not Found - GET - Not found
npm ERR! 404
npm ERR! 404  '@ionic-enterprise/inappbrowser@latest' is not in the npm registry.

I have also run npm config set registry but still get the same error