Connecting to Online Database in Java

Question

I am writing a project in Java. I want the app to work offline but the app MUST be activated first before use.
After activation, the app will use its local database. Please how do I go about it.

Answer 1

What about storing some kind of file local after activation? Something like a license?

Answer 2

Ok. Where I'm getting some kind of issues is...if user1 shares the app to user2, user2 will also have to activate the app with a different pin before he can use it. Thanks