Show the peer code already after joining

[dpc]

Currently the peer code is shown after successful DKG to share with other guardians.

This is OK, but if you one is setting up Federation in an async way, it forces an extra round of communication.

If the code was shown right after the follower joined the DKG, they could copy & paste and already share it with other guardians, without waiting for other guardians to join.

Obviously it still should be shown on the final verification screen as well, just in cases it's still needed.

[Kodylow]

Do we already have that info at that point? I thought we only get it after DKG?