Open Microsoft Teams and go to Apps > Upload a Custom App > Upload for "yourdomain"

Select the app package that you have previously created and click upload. This will load the app into your Teams account and the bot will be visible at the top in the "Built for yourdomain" section.

Clicking on the App will show all the details that you have previosly configured in Visual Studio Code with the App studio.

To get started with your bot, click Open and a channel with your bot in it will open automatically. 

Start typing to interact with your bot.