A word of caution here. I unsuccessfully tried to do this over the weekend, and it was an exercise in frustration rather than being helpful thing.
Maybe it is because I don't have a Smartthings hub? Maybe it is due to the new Samsung app vs the Classic app? Maybe my IP is on a naughty list? Don't know, all I know is the new Samsung app would not allow me to log in without a lot of crazy "games" of install/uninstall, wiping the cache, android cleaner apps, and more. That took like 6 hours of continuous around to get to that point.
Then it would not let me paste the needed Hubconnect "secret code" in the Hubconnect app on Smartthings. The option isn't even there to allow this, at least on my particular instance. The code itself installed fine, but if you cannot authenticate to tie hubs together, this app is worthless. That was another few hours of around.
In my opinion, I don't think this is a viable option going forward. I would try to find a different way.