Create a group called autologin
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sudo groupadd -r autologin
Add the user that you want to autologin to that group
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sudo gpasswd -a username autologin
Replace the username with you username.
add or uncomment line autologin-user = username to /etc/lightdm/lightdm.conf
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sudo echo "autologin-user=username" >> /etc/lightdm/lightdm.conf
Replace the username with you username.
Restart you system, hopefully it will work.