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 # ToDo
 * infinite scroll
     * https://stackoverflow.com/questions/67624601/how-to-implement-infinite-scroll-in-next-js
-* authentication
-* multi-user support
+* authentication with Google
+    * https://www.telerik.com/blogs/how-to-implement-google-authentication-nextjs-app-using-nextauth* multi-user support
 * bill amount entry
     * monthly bill amount summery
 * build & deploy via docker