Manage countries where you want sell

Go to Settings --> General on the dashboard

Scroll down to the Login/Signup → Distribution Countries

Here you can manage the following:

Countries where you want to make your app available

Login method (auth method) for the countries where the app is available

Set the status of your app as 'unavailable' or 'available' in the list of countries. You can change the status for a particular country anytime.

The auth method defines how users in a particular country will login to your website and app

For example let's say the auth method for India is set to 'Mobile and Email with Password and social logins

In this case, users from India will see the following options while signing up or logging in:

That's really how easy it is to select and manage countries where you want your app to be available :)