Hello @Fabio !
On what platform are you deploying on? The easiest more robust way I know of is having Nginx with simple authentication as a reverse proxy to your page. Check out the guides in the Webservers > nginx section of the deployment community page to find some examples of guarding the Streamlit app. Though if you want to protect the whole page, any guide on Google with the keywords “nginx authenticate reverse proxy” should do the trick 
.
Good luck, your app with embedded Streamlit looks pretty awesome!
Fanilo 