Mint julia on USB

I have just installed Mint Julia on a 4gb usb stick, a couple of problems have come up. First I want to set a password at startup but it keeps asking for the original and of course I have never set one up! Secondly I keep getting a request to set up a password key for things like my WiFi and I dont really want to. Any suggestions?

It souldn’t really be asking for a username/password, but by default the LiveCD/USB should be

Username: mint
Password:

The keyring password… if it is asking you to set one up… just leave it blank, and when it complains about “unsafe storage” accept it anyway.

[EDIT]
The normal way to change a users password would be sudo passwd then follow the prompts for your old password (probably blank) and the new password twice … as in
sudo passwd mint
but I have no idea how this will behave in a (squashfs) LiveUSB with autologin enabled… so attempt this at your own risk… worst case scenario, you’ll have to recreate the LiveUSB.