You forgot the part where they send you two distinct snail mails, one with the username and one with a one-time password, for a double chance the post will lose

You forgot the part where they send you two distinct snail mails, one with the username and one with a one-time password, for a double chance the post will lose one of the envelopes! Or the part where they silently truncate your new password to 6 digits because muh security. I guess France and Germany are siblings in kafkaesque administrative shenanigans.