You can autologin: https://wiki.ubuntu.com/LightDM#Setting_an_Automatic_Login
I advise against not using any password. If you do so, any vulnerability in any program would allow the attacker to install any malware on your system.
You can autologin: https://wiki.ubuntu.com/LightDM#Setting_an_Automatic_Login
I advise against not using any password. If you do so, any vulnerability in any program would allow the attacker to install any malware on your system.