What are login and password for Poky Yocto : core-image-full-cmdline-imx6qdlcubox.wic.gz

I.MX6
1

what are login and password for Poky Yocto : core-image-full-cmdline-imx6qdlcubox.wic.gz

On an hummingboard IMX6 I am able to boot with this image:
core-image-full-cmdline-imx6qdlcubox.wic.gz

But I didn’t find login and password.
debian debian do not work
neither Debian Debian
neither Poky Yocto, poky yocto, yocto poky, Yokto Poky, Yokto poky …

2

Username: root
PW: root
?

3

according this

https://docs.yoctoproject.org/pipermail/yocto/2011-September/002708.html

it shoud be:
username root
password

password is blank

4

root as login,
no password
it works
thanks
Jacques