It is not an official game sharing on Nintendo Switch, but you can play your digital games on someone else’s console. When you download your account from a friend’s Switch, you simply have access to all your digitally purchased content.
Game sharing on Nintendo Switch, but not quite
On the Xbox One and PlayStation 4 you can use a handy trick to share your digital game collection with your friends (by adjusting the settings of your primary console). The Nintendo Switch now also has a similar feature, but it does not work quite the same. Where other players can play your digital games on a PlayStation or Xbox without you having to be logged in, you can not do this on the Switch. The function is not entirely intended for this, but can be used.
The idea behind this feature is that the owner of the Nintendo account, which has a lot of digital games on it, can also play his games when he is with his friends. All you have to do is download your Nintendo account to a friend’s Nintendo Switch, and you can immediately start downloading. The games can only be played when the owner of the games is logged in, which can cause a problem when you think of game sharing as a PlayStation or Xbox gamer.
It is because you can only play one game at a time. For example, if you play Mario Kart on your friend’s console and start downloadable content on your primary console, your current session will simply be paused. It is not so that you can share your digital games as you can on Xbox One and PlayStation 4, but it is possible as long as only one person is playing digital software. As it now looks, you will need system update 6.0 for this.