I'm a beginner in ethereum application developing. Actually I started some days ago with a book and now I tried to build my first smart contract using BUIDL, actually at this site: https://buidl.secondstate.io/. I send 0.10$ to my default address, just to try to "deploy to the blockchain" setting provider, gas, and so on. It works. But what happens if I quit of that session?? I still have eth on my default wallet, I know that I can import it on another build instance, but how can I find the private key??
For example I want to import the Default account of the following image, how to do it?