yea, oke I got that, but what was the thing? 2FA code? is that another term for the second password,
or is that another term for that secret sentence of maximal 255 characters?
give me please an EXAMPLE of a private key,please
because this is still very unclear to me,
I just don't understand WAT that private key is and where to find it
It stands for two-factor authentication. It may be an another password or a code which have sent into your email or your device.
That 255 character code was mnemonic seed. It was a backup key in case you forgot your password.
You can read private key here: https://en.bitcoin.it/wiki/Private_key
so that privat key can be my second password.......