What is the default account of Linux JetPack 4.4?

I flash the Linux JetPack 4.4 to jetson nano, but doesn’t complete the headless initial configuration. Username and password are not configured. After reconnect the serial terminal,the jetson ask me login credentials.

Does Linux JetPack 4.4 have default account if initial configuration is not completed?

No, there is no default account. Please try to reflash it again and configure the user account.

The account is created during initial configuration (if initial config fails, then there is no user).