Slider with Dropdown to reset rootViewController or push new viewController

[keyuraashra]

I am having drop down inside the Slider like we have in Android Gmail application where app shows your multiple accounts connected to gmail. When we click on any other account it redirect us to Inbox and closes the slider.

I am trying to do exactly same thing but I can't push the root view controller and don't know how to remove old stack from NavigationController.

Can you please guide how can we do this?