Using OAuth for multi-user Shiny app

[diegocgaona]

I want to create a multi-user Shiny app (in my server), where users login to their own Google account and the app works with their data.

I think I will need to create a web application key in Google API manager, and with it, I will build my app and the users could click in a login button and be redirected to Google, where they can authorize the access for Analytics data.
This is possible with RGoogleAnalytics? (I think this would be similar to rga.open in the RGA package, but without the need to insert the token in the source code)

There another way to use a token which persist for more than 1 hour? (more than one month if possible).

Thanks! And thanks for this great package.