title: Get user IP in Shiny
body: <p>Is there a way to get the IP of the person accessing the shiny app? Hopefully there's a R/Shiny solution but I can accept a javascript solution as well. I want to reverse geocode the IP to make graphs that visualize which countries most users access the app from -- and then put that information in the app for all users to see. I only need a way to get the users IP, the other things are easily solveable.</p>